Document and Entity Information - USD ($) $ in Millions	12 Months Ended
Document and Entity Information - USD ($) $ in Millions	Dec. 31, 2016	Mar. 06, 2017	Jul. 01, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Trading Symbol	ULH
Entity Registrant Name	Universal Logistics Holdings, Inc.
Entity Central Index Key	0001308208
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		28,442,894
Entity Public Float			$ 107.7

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,755	$ 12,930
Marketable securities	14,359	13,431
Accounts receivable – net of allowance for doubtful accounts of $1,613 and $5,173, respectively	144,712	141,275
Other receivables	15,438	15,422
Due from affiliates	2,513	1,924
Prepaid income taxes	11,300
Prepaid expenses and other	17,374	17,858
Total current assets	207,451	202,840
Property and equipment, net	246,277	177,189
Goodwill	74,484	74,484
Intangible assets – net of accumulated amortization of $50,971 and $43,495, respectively	37,189	44,665
Deferred income taxes	164	83
Other assets	4,892	3,894
Total assets	570,457	503,155
Current liabilities:
Accounts payable	65,945	46,347
Due to affiliates	4,597	3,413
Accrued expenses and other current liabilities	19,665	18,989
Insurance and claims	19,754	21,906
Income taxes payable		1,045
Current portion of long-term debt	34,455	61,224
Current maturities of capital lease obligations	100	916
Total current liabilities	144,516	153,840
Long-term liabilities:
Long-term debt, net of current portion	226,812	172,190
Capital lease obligations, net of current maturities	92	1,065
Deferred income taxes	47,819	40,496
Other long-term liabilities	3,486	4,483
Total long-term liabilities	278,209	218,234
Shareholders' equity:
Common stock, no par value. Authorized 100,000,000 shares; 30,917,952 and 30,884,727 shares issued; 28,430,394 and 28,398,900 shares outstanding, respectively	30,919	30,885
Paid-in capital	3,451	2,914
Treasury stock, at cost; 2,487,558 and 2,485,827 shares, respectively	(50,044)	(50,018)
Retained earnings	166,033	149,743
Accumulated other comprehensive income (loss):
Unrealized holding gain on available-for-sale securities, net of income taxes of $1,512 and $1,015, respectively	2,679	1,801
Interest rate swaps, net of income taxes of $62 and $0, respectively	99
Foreign currency translation adjustments	(5,405)	(4,244)
Total shareholders’ equity	147,732	131,081
Total liabilities and shareholders’ equity	$ 570,457	$ 503,155

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,613	$ 5,173
Intangible assets, accumulated amortization	$ 50,971	$ 43,495
Common stock, par value
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	30,917,952	30,884,727
Common stock, shares outstanding	28,430,394	28,398,900
Treasury stock, shares	2,487,558	2,485,827
Income tax expense on unrealized holding gain on available-for-sale securities	$ 1,512	$ 1,015
Interest rate swaps, income taxes	$ 62	$ 0

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating revenues:
Transportation services, including related party amounts of $1,090, $400 and $138, respectively	$ 629,192	$ 696,134	$ 769,308
Value-added services	302,225	285,258	284,496
Intermodal services, including related party amounts of $0, $0 and $170, respectively	141,334	147,381	137,717
Total operating revenues	1,072,751	1,128,773	1,191,521
Operating expenses:
Purchased transportation and equipment rent, including related party amounts of $233, $3,347 and $930, respectively	509,775	567,558	615,327
Direct personnel and related benefits, including related party amounts of $26,267, $23,792 and $16,623, respectively	262,659	220,653	208,505
Commission expense	32,350	37,844	43,922
Operating expenses, including related party amounts of $2,656, $1,983 and $1,233, respectively	96,612	108,523	116,611
Occupancy expense, including related party amounts of $17,174, $13,174 and $10,472, respectively	31,923	27,004	25,063
Selling, general, and administrative, including related party amounts of $5,557, $6,418 and $3,736, respectively	38,426	37,510	42,214
Insurance and claims, including related party amounts of $15,362, $17,360 and $18,102, respectively	17,724	21,413	25,991
Depreciation and amortization	36,702	34,873	33,053
Total operating expenses	1,026,171	1,055,378	1,110,686
Income from operations	46,580	73,395	80,835
Interest income	157	55	46
Interest expense	(8,266)	(9,235)	(8,229)
Other non-operating income	934	790	447
Income before provision for income taxes	39,405	65,005	73,099
Provision for income taxes	15,161	25,004	27,729
Net income	$ 24,244	$ 40,001	$ 45,370
Earnings per common share:
Basic	$ 0.85	$ 1.37	$ 1.51
Diluted	$ 0.85	$ 1.37	$ 1.51
Weighted average number of common shares outstanding:
Basic	28,411	29,233	30,013
Diluted	28,411	29,235	30,044
Dividends declared per common share	$ 0.28	$ 0.28	$ 0.28

Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Transportation services, related party amounts	$ 1,090	$ 400	$ 138
Intermodal services, related party amounts	0	0	170
Purchased transportation and equipment rent [Member]
Operating expenses, related party amounts	233	3,347	930
Direct personnel and related benefits [Member]
Operating expenses, related party amounts	26,267	23,792	16,623
Operating expenses [Member]
Operating expenses, related party amounts	2,656	1,983	1,233
Occupancy expense [Member]
Operating expenses, related party amounts	17,174	13,174	10,472
Selling, general, and administrative [Member]
Operating expenses, related party amounts	5,557	6,418	3,736
Insurance and claims [Member]
Operating expenses, related party amounts	$ 15,362	$ 17,360	$ 18,102

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 24,244	$ 40,001	$ 45,370
Other comprehensive income (loss):
Unrealized holding gains (losses) on available-for-sale securities arising during the period, net of income taxes	1,142	(1,015)	412
Realized gains on available-for-sale securities reclassified into income, net of income taxes	(264)	(72)
Unrealized changes in fair value of interest rate swaps, net of income taxes	99
Foreign currency translation adjustments	(1,161)	(2,252)	(1,631)
Total other comprehensive (loss)	(184)	(3,339)	(1,219)
Total comprehensive income	$ 24,060	$ 36,662	$ 44,151

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 24,244	$ 40,001	$ 45,370
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	36,702	34,873	33,053
Gain on sale of marketable equity securities	(412)	(347)
Other-than-temporary impairment of marketable securities		230
Loss on disposal of property and equipment	161	239	233
Amortization of debt issuance costs	312	648	693
Write-off of debt issuance costs		1,272
Stock-based compensation	571	494	1,485
Provision for doubtful accounts	3,099	3,004	3,504
Deferred income taxes	6,610	478	1,433
Change in assets and liabilities:
Trade and other accounts receivable	(7,510)	4,424	(19,857)
Prepaid income taxes, prepaid expenses and other assets	(12,748)	4,347	984
Accounts payable, accrued expenses, insurance and claims and other current liabilities	18,003	(11,695)	13,027
Due to/from affiliates, net	595	83	(1)
Other long-term liabilities	(998)	253	(532)
Net cash provided by operating activities	68,629	78,304	79,392
Cash flows from investing activities:
Capital expenditures	(97,351)	(26,257)	(59,784)
Proceeds from the sale of property and equipment	2,426	816	1,326
Purchases of marketable securities	(17)	(1,159)	(2,063)
Proceeds from sale of marketable securities	866	441
Acquisitions of businesses			(2,648)
Net cash used in investing activities	(94,076)	(26,159)	(63,169)
Cash flows from financing activities:
Proceeds from borrowing - revolving debt	220,633	172,758	135,019
Repayments of debt - revolving debt	(217,368)	(161,293)	(135,149)
Proceeds from borrowing - term debt	99,534	163,578	2,500
Repayments of debt - term debt	(78,520)	(175,428)	(4,572)
Dividends paid	(7,954)	(8,171)	(8,409)
Payment of capital lease obligations	(1,789)	(1,050)	(1,349)
Purchases of treasury stock	(26)	(35,065)	(5,631)
Capitalized financing costs	(396)	(1,499)
Net cash provided by (used in) financing activities	14,114	(46,170)	(17,591)
Effect of exchange rate changes on cash and cash equivalents	158	(1,046)	(854)
Net (decrease) increase in cash	(11,175)	4,929	(2,222)
Cash and cash equivalents – beginning of period	12,930	8,001	10,223
Cash and cash equivalents – end of period	1,755	12,930	8,001
Supplemental cash flow information:
Cash paid for interest	7,802	7,649	7,379
Cash paid for income taxes	20,896	$ 21,541	20,833
Acquisition of businesses:
Fair value of assets acquired, net of cash			1,270
Payment of acquisition obligations			1,378
Net cash paid for acquisition of businesses			$ 2,648
Non-cash investing and financing activities
Non-cash capital expenditures pursuant to promissory note.	$ 3,700

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock [Member]	Paid-in capital [Member]	Treasury stock [Member]	Retained earnings [Member]	Accumulated other comprehensive income (loss) [Member]
Balances at Dec. 31, 2013	$ 105,565	$ 30,746	$ 1,074	$ (9,322)	$ 80,952	$ 2,115
Net income	45,370				45,370
Comprehensive income (loss)	(1,219)					(1,219)
Dividends paid	(8,409)				(8,409)
Issuance of common stock		20	(20)
Stock based compensation	1,485	91	1,394
Purchases of treasury stock	(5,631)			(5,631)
Balances at Dec. 31, 2014	137,161	30,857	2,448	(14,953)	117,913	896
Net income	40,001				40,001
Comprehensive income (loss)	(3,339)					(3,339)
Dividends paid	(8,171)				(8,171)
Stock based compensation	494	28	466
Purchases of treasury stock	(35,065)			(35,065)
Balances at Dec. 31, 2015	131,081	30,885	2,914	(50,018)	149,743	(2,443)
Net income	24,244				24,244
Comprehensive income (loss)	(184)					(184)
Dividends paid	(7,954)				(7,954)
Stock based compensation	571	34	537
Purchases of treasury stock	(26)			(26)
Balances at Dec. 31, 2016	$ 147,732	$ 30,919	$ 3,451	$ (50,044)	$ 166,033	$ (2,627)

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

(1)	Summary of Significant Accounting Policies

(a)

Business

Universal Logistics Holdings, Inc. (“Universal” or the “Company”), through its subsidiaries, is a leading asset-light provider of customized transportation and logistics solutions throughout the United States, and in Mexico, Canada and Colombia. Formerly known as Universal Truckload Services, Inc., we provide our customers with supply chain solutions that can be scaled to meet their changing demands. We offer our customers with a broad array of services across their entire supply chain, including transportation, value-added, and intermodal services. Our customized solutions and flexible business model are designed to provide us with a highly variable cost.

(b)

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions relating to these entities have been eliminated.

Our fiscal year consists of four quarters, each with thirteen weeks.

Certain immaterial reclassifications have been made to the prior financial statements in order for them to conform to the December 31, 2016 presentation.

(c)

Use of Estimates

The preparation of the consolidated financial statements requires management of the Company to make a number of estimates and assumptions related to the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to such estimates and assumptions include the fair value of assets and liabilities acquired in business combinations; carrying amounts of property and equipment and intangible assets; marketable securities; valuation allowances for receivables; and liabilities related to insurance and claim costs. Actual results could differ from those estimates.

(d)

Cash and Cash Equivalents

We consider all highly liquid investments, purchased with a maturity of three months or less, to be cash equivalents. Accounts at banks with an aggregate excess of the amount of checks issued over cash balances are included as accounts payable in current liabilities in the consolidated balance sheets, and changes in such accounts are reported as cash flows from operating activities in the consolidated statements of cash flows.

(e)

Marketable Securities

At December 31, 2016 and 2015, marketable securities, all of which are available-for-sale, consist of common and preferred stocks. Marketable securities are carried at fair value, with unrealized gains and losses, net of related income taxes, reported as accumulated other comprehensive income (loss), except for losses from impairments which are determined to be other-than-temporary. Realized gains and losses, and declines in value judged to be other-than-temporary on available-for-sale securities are included in the determination of net income and are included in other non-operating income (expense), at which time the average cost basis of these securities are adjusted to fair value. Fair values are based on quoted market prices at the reporting date. Interest and dividends on available-for-sale securities are included in other non-operating income (expense). During the years ended December 31, 2016 and 2015, we received proceeds of $0.9 million and $0.4 million from the sale of marketable securities with a combined cost of $0.5 million and $0.1 million resulting in a realized gain of $0.4 million and $0.3 million, respectively. The Company did not sell any marketable securities during the year ended December 31, 2014.

(1)	Summary of Significant Accounting Policies—continued

(e)

Marketable Securities—continued

The cost, gross unrealized holding gains, gross unrealized holding losses, and fair value of available-for-sale securities by type were as follows (in thousands):

	Cost		Gross unrealized holding gains		Gross unrealized holding (losses)			Fair Value
At December 31, 2016
Equity Securities	$	10,168	$	4,780	$	(589	)	$	14,359
At December 31, 2015
Equity Securities	$	10,614	$	3,958	$	(1,141	)	$	13,431

Included in equity securities at December 31, 2016 were securities with a book basis of $3.5 million and a cumulative loss position of $0.6 million, the impairment of which we consider to be temporary. We consider several factors in determining as to whether declines in value are judged to be temporary or other-than-temporary, including the severity and duration of the decline, the financial condition and near-term prospects of the specific issuers and the industries in which they operate, and our intent and ability to hold these securities. We may incur future impairment charges if declines in market values continue and/or worsen and impairments are no longer considered temporary.

The fair value and gross unrealized holding losses of our marketable securities that are not deemed to be other-than-temporarily impaired aggregated by type and length of time they have been in a continuous unrealized loss position were as follows (in thousands):

	Less than 12 Months				12 Months or Greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
At December 31, 2016
Equity securities	$	426	$	41	$	2,438	$	548	$	2,864	$	589
At December 31, 2015
Equity securities	$	3,099	$	987	$	345	$	154	$	3,444	$	1,141

At December 31, 2016, our portfolio of equity securities in a continuous loss position, the impairment of which we consider to be temporary, consists primarily of common stocks in the oil and gas, banking, transportation, communication, and pharmaceutical industries. The fair value and unrealized losses are distributed in 27 publicly traded companies, with no single industry or company representing a material or concentrated unrealized loss. We have evaluated the near-term prospects of the various industries, as well as the specific issuers within our portfolio, in relation to the severity and duration of the impairments, and based on that evaluation, and our ability and intent to hold these investments for a reasonable period of time to allow for a recovery of fair value, we do not consider these investments to be other-than-temporarily impaired at December 31, 2016.

(1)	Summary of Significant Accounting Policies—continued

(f)

Accounts Receivable

Accounts receivable are recorded at the net invoiced amount, net of an allowance for doubtful accounts, and do not bear interest. They include unbilled amounts for services rendered in the respective period but not yet billed to the customer until a future date, which typically occurs within one month. In order to reflect customer receivables at their estimated net realizable value, we record charges against revenue based upon current information. These charges generally arise from rate changes, errors, and revenue adjustments that may arise from contract disputes or differences in calculation methods employed by the customer. The allowance for doubtful accounts is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine the allowance based on historical write-off experience and the aging of our outstanding accounts receivable. Balances are considered past due based on invoiced terms. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. We do not have any off‑balance‑sheet credit exposure related to our customers. Accounts receivable from affiliates are shown separately and include trade receivables from the sale of services to affiliates.

(g)

Inventories

Included in prepaid expenses and other is inventory used in a portion of our value-added service operations. Inventories are stated at the lower of cost or market. Cost is determined using the first-in, first-out method. Provisions for excess and obsolete inventories are based on our assessment of excess and obsolete inventory on a product-by-product basis.

At December 31, inventory consists of the following (in thousands):

	2016		2015
Raw materials and supplies	$	7,077	$	7,660
Finished goods		1,540		962
	$	8,617	$	8,622

(h)

Property and Equipment

Property and equipment, including leasehold improvements, are carried at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets as follows:

Description		Life in Years
Transportation equipment		3 - 15
Other operating assets		3 - 15
Information technology equipment		3 - 5
Buildings and related assets		10 - 39

The amounts recorded for depreciation expense were $29.2 million, $25.8 million, and $23.1 million for the years ended December 31, 2016, 2015 and 2014, respectively.

Tire repairs, replacement tires, replacement batteries, consumable tools used in our logistics services, and routine repairs and maintenance on vehicles are expensed as incurred. Parts and fuel inventories are included in prepaid expenses and other. We capitalize certain costs associated with vehicle repairs and maintenance that materially extend the life or increase the value of the vehicle or pool of vehicles.

(1)	Summary of Significant Accounting Policies—continued

(i)

Intangible Assets

Intangible assets subject to amortization consist of customer contracts and agent and customer relationships that have been acquired in business combinations. These assets are amortized either over the period of economic benefit or on a straight-line basis over the estimated useful lives of the related intangible asset. The estimated useful lives of these intangible assets range from three to nineteen years. The weighted average amortization period for customer contracts is approximately three years, and the weighted average amortization period for agent and customer relationships is approximately fifteen years. Collectively, the weighted average amortization period of assets subject to amortization is approximately twelve years. The useful lives of acquired trademarks are indefinite and, therefore, not subject to amortization.

Our identifiable intangible assets as of December 31, 2016 and 2015 are as follows (in thousands):

	2016			2015
Indefinite Lived Intangibles:
Trademarks	$	2,500		$	2,500
Definite Lived Intangibles:
Agent and customer relationships		65,060			65,060
Customer contracts		20,600			20,600
Less: accumulated amortization		(50,971	)		(43,495	)
Intangible assets, net	$	34,689		$	42,165
Total Identifiable Intangible Assets	$	37,189		$	44,665

Estimated amortization expense by year is as follows (in thousands):

2017	$	5,995
2018		2,517
2019		2,265
2020		1,970
2021		1,959
Thereafter		19,983
Total	$	34,689

The amounts recorded for amortization expense were $7.5 million, $9.2 million, and $9.9 million for the years ended December 31, 2016, 2015 and 2014, respectively.

(j)

Goodwill

Goodwill represents the excess purchase price over the fair value of assets acquired in connection with the Company’s acquisitions. Under FASB Accounting Standards Codification, or ASC, Topic 350 “Intangibles – Goodwill and Other”, we are required to test goodwill for impairment annually (in our third fiscal quarter) or more frequently, whenever events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit with goodwill below its carrying amount. We have the option to first assess qualitative factors such as current performance and overall economic conditions to determine whether or not it is necessary to perform a two-step quantitative goodwill impairment test. If we choose that option, we would not be required perform Step 1 of the test unless we determine that, based on a qualitative assessment, it is more likely than not that the fair value of a reporting unit is less than its carrying value. If we determine that it is more likely than not, or if we choose not to perform a qualitative assessment, we may then proceed with Step 1 of the two-step impairment test. In the quantitative goodwill test, a company compares the carrying value of a reporting unit to its fair value. If the carrying value of the reporting unit exceeds the estimated fair value, a second step is performed, which compares the implied fair value of goodwill to the carrying value, to determine the amount of impairment. During the third quarter of 2016, we completed our goodwill impairment testing by performing a quantitative assessment. Based on the results of this test, no impairment loss was recognized.

(1)	Summary of Significant Accounting Policies—continued

(j)

Goodwill—continued

At both December 31, 2016 and 2015, the carrying amount of goodwill was $74.5 million, of which $18.2 million was recorded in our transportation segment and $56.3 million in our logistics segment.

(k)

Long-Lived Assets

Long-lived assets, other than goodwill and indefinite lived intangibles such as property and equipment and purchased intangible assets subject to amortization are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or group may not be recoverable. If circumstances require a long-lived asset to be tested for possible impairment, we first compare the undiscounted cash flows expected to be generated by a long-lived asset or group to its carrying value. If the carrying value of the long-lived asset or group is deemed to not be recoverable on an undiscounted cash flow basis, an impairment charge is recognized to the extent that the carrying value exceeds its fair value. Fair value is determined through various valuation techniques including discounted cash flow models, quoted market prices and independent third-party appraisals. Changes in management’s judgment relating to salvage values and/ or estimated useful lives could result in greater or lesser annual depreciation expense or impairment charges in the future. Indefinite lived intangibles are tested for impairment annually by comparing the carrying value of the assets to their fair value.

(l)

Contingent Consideration

Contingent consideration arrangements granted in connection with a business combination are evaluated to determine whether contingent consideration is, in substance, additional purchase price of an acquired enterprise or compensation for services, use of property or profit sharing. Additional purchase price is added to the fair value of consideration transferred in the business combination and compensation is included in operating expenses in the period it is incurred. Contingent consideration related to additional purchase price is remeasured to fair value at each reporting date until the contingency is resolved.

(m)

Fair Value of Financial Instruments

For cash equivalents, accounts receivables, accounts payable, and accrued expenses, the carrying amounts are reasonable estimates of fair value as the assets are readily redeemable or short‑term in nature and the liabilities are short-term in nature. Marketable securities, consisting of equity securities, are carried at fair market value as determined by quoted market prices. Our revolving credit and term loan agreements consist of variable rate borrowings. The carrying value of these borrowings approximates fair value because the applicable interest rates are adjusted frequently based on short-term market rates. For our equipment promissory notes, the fair values are estimated using discounted cash flow analyses, based on our current incremental borrowing rates for similar types of borrowing arrangements. See Note 7 “Fair Value Measurement and Disclosures” for further information.

(n)

Deferred Compensation

Deferred compensation relates to our bonus plans. Annual bonuses may be awarded to certain operating, sales and management personnel based on overall Company performance and achievement of specific employee or departmental objectives. Such bonuses are typically paid in annual installments over a five-year period. All bonus amounts earned by and due to employees in the current year are included in accrued expenses and other current liabilities. Those that are payable in subsequent years are included in other long-term liabilities.

(1)	Summary of Significant Accounting Policies—continued

(o)

Closing Costs

Our customers may discontinue or alter their business activity in a location earlier than anticipated, prompting us to exit a customer-dedicated facility. We recognize exit costs associated with operations that close or are identified for closure as an accrued liability in the Consolidated Balance Sheets. Such charges include lease termination costs, employee termination charges, asset impairment charges, and other exit-related costs associated with a plan approved by management. If we close an operating facility before its lease expires, costs to terminate a lease are recognized when an early termination provision is exercised, or we record a liability for non-cancellable lease obligations based on the fair value of remaining lease payments, reduced by any existing or prospective sublease rentals. Employee termination costs are recognized in the period that the closure is communicated to affected employees. The recognition of exit and disposal charges requires us to make certain assumptions and estimates as to the amount and timing of such charges. Subsequently, adjustments are made for changes in estimates in the period in which the change becomes known.

(p)

Revenue and Related Expenses

We are the primary obligor when rendering transportation services, value-added services and intermodal services, and we assume the corresponding credit risk with customers. We have discretion in setting sales prices and, as a result, our earnings may vary. In addition, we have discretion to choose and negotiate terms with our multiple suppliers for the services ordered by our customers. This includes owner-operators with whom we contract to deliver our transportation services. As such, revenue and the related purchased transportation and commissions are recognized on a gross basis when persuasive evidence of an arrangement exists, delivery has occurred at the receiver’s location or for service arrangements after the related services have been rendered, the revenue and related expenses are fixed or determinable and collectability is reasonably assured. Fuel surcharges, where separately identifiable, of $50.9 million, $75.7 million and $119.7 million for the years ended December 31, 2016, 2015 and 2014, respectively, are included in operating revenues.

Revenues and associated costs for the sales of axles and machined components are recognized when title has passed and the risks and rewards of ownership are transferred, which is at the time of shipment.

Our customer contracts could involve multiple revenue-generating activities performed for the same customer. When several contracts are entered into with the same customer in a short period of time, we evaluate whether these contracts should be considered as a single, multiple element contract for revenue recognition purposes. Criteria we consider that may result in the aggregation of contracts include whether such contracts are actually entered into within a short period of time, whether services in multiple contracts are interrelated, or if the negotiation and terms of one contract show or include consideration for another contract or contracts. Our current contracts have not been required to be aggregated, as they are negotiated independently on a standalone basis. Our customers typically choose their vendor and award business at the conclusion of a competitive bidding process for each service. As a result, although we evaluate customer purchase orders and agreements for multiple elements and aggregation of individual contracts into a multiple element arrangement, our current contracts do not meet the criteria required for multiple element contract accounting.

(q)

Insurance & Claims

Insurance and claims expense represents charges for premiums and the accruals made for claims within our self-insured retention amounts. The accruals are primarily related to auto liability, general liability, cargo and equipment damage, and service failure claims. A liability is recognized for the estimated cost of all self-insured claims including an estimate of incurred but not reported claims based on historical experience and for claims expected to exceed our policy limits. We may also make accruals for personal injury and property damage to third parties, and workers’ compensation claims if a claim exceeds our insurance coverage. Such accruals are based upon individual cases and estimates of ultimate losses, incurred but not reported losses, and losses arising from known claims ultimately settling in excess of insurance coverage using loss development factors based upon industry data and past experience. Since the reported accrual is an estimate, the ultimate liability may be different from the amount recorded.

If adjustments to previously established accruals are required, such amounts are included in operating expenses in the current period. We maintain insurance with licensed insurance carriers. Legal expenses related to auto liability claims are covered under our insurance policy. We are responsible for all other legal expenses related to claims.

(1)	Summary of Significant Accounting Policies—continued

(q)

Insurance & Claims—continued

In brokerage arrangements, our exposure to liability associated with accidents incurred by other third-party carriers, who haul freight on our behalf, is reduced by various factors including the extent to which the third party providers maintain their own insurance coverage.

Our insurance expense varies primarily based upon the frequency and severity of our accident experience, insurance rates, coverage limits, and self-insured retention amounts.

(r)

Stock Based Compensation

We record compensation expense for the grant of stock based awards. Compensation expense is measured at the grant date, based on the calculated fair value of the award, and recognized as an expense over the requisite service period (generally the vesting period of the grant). See Note 13 “Stock Based Compensation” for further information.

(s)

Income Taxes

Deferred income taxes are provided for temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. During 2016, we adopted Accounting Standards Update 2015-17 – Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”), which requires an entity to present deferred tax assets and deferred tax liabilities as noncurrent in a classified balance sheet. Deferred tax assets in the prior period presented have been reclassified to conform to the current year presentation. See Note 9, Income Taxes, for further information.

We are no longer subject to U.S. federal income tax examinations by tax authorities for years before 2012. In addition, we file income tax returns in various state, local and foreign jurisdictions. Historically, we have been responsible for filing separate state, local and foreign income tax returns for our self and our subsidiaries. We are no longer subject to state or foreign jurisdiction income tax examinations for years before 2011 and 2010, respectively.

We recognize the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. We recognize interest related to unrecognized tax benefits in income tax expense and penalties in other operating expenses.

(t)

Foreign Currency Translation

The financial statements of the Company’s subsidiaries operating in Mexico, Canada and Colombia are prepared to conform to U.S. GAAP and translated into U.S. Dollars by applying a current exchange rate. The local currency has been determined to be the functional currency. Items appearing in the Consolidated Statements of Income are translated using average exchange rates during each period. Assets and liabilities of international operations are translated at period-end exchange rates. Translation gains and losses are reported in accumulated other comprehensive income (loss) as a component of shareholders’ equity.

(u)

Segment Information

We report our financial results in two reportable segments, the transportation segment and the logistics segment, based on the nature of the underlying customer commitment and the types of investments required to support these commitments. This presentation reflects the manner in which management evaluates our operating segments, including an evaluation of economic characteristics and applicable aggregation criteria.

Operations aggregated in our transportation segment are associated with individual freight shipments coordinated by our agents, company-managed terminals and specialized services operations. In contrast, operations aggregated in our logistics segment deliver value-added services or transportation services to specific customers on a dedicated basis, generally pursuant to contract terms of one year or longer. Other non-reportable operating segments are comprised of the Company’s subsidiaries that provide support services to other subsidiaries and to owner-operators, including shop maintenance and equipment leasing.

(1)	Summary of Significant Accounting Policies—continued

(v)

Concentrations of Credit Risk

Financial instruments, which potentially subject us to concentrations of credit risk, consist principally of cash and cash equivalents, marketable securities and accounts receivable. We maintain our cash and cash equivalents and marketable securities with high quality financial institutions. We perform ongoing credit evaluations of our customers and generally do not require collateral. Our customers are generally concentrated in the automotive, wind energy, building materials, machinery and metals industries. During the fiscal years ended December 31, 2016, 2015 and 2014, aggregate sales in the automotive industry totaled 42.5%, 37.3% and 36.5% of revenue, respectively. In 2016, 2015 and 2014, General Motors accounted for approximately 17.9%, 11.4% and 9.7% of our total operating revenues, respectively. In 2016, sales to our top 10 customers, including General Motors, totaled 40.9%.

(w)

Recent Accounting Pronouncements

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 is a comprehensive revenue recognition model requiring a company to recognize revenue to depict the transfer of goods or services to a customer at an amount reflecting the consideration it expects to receive in exchange for those goods or services. In applying the new guidance, an entity will (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the contract’s performance obligations; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. In July 2015, the FASB approved deferring the effective date by one year to December 15, 2017 for annual reporting periods beginning after that date. The FASB also approved permitting early adoption of the standard, but not before the original effective date of December 15, 2016. We do not plan to adopt the standard early and have not yet determined which transition method will be used. We are currently evaluating the effects of this standard. We have performed an initial assessment by reviewing our current revenue recognition practices to those required by the new standard. The adoption of ASU 2014-09 is not expected to have a material impact on the Company’s financial statements.

In April 2015, the FASB issued ASU 2015-03, Interest—Imputation of Interest. On January 1, 2016, the Company adopted this ASU on a retrospective basis. Adoption resulted in a reclassification in the Company’s current prepaid expenses and other, and noncurrent other assets in its consolidated balance sheet as of December 31, 2015 of $0.3 million and $1.2 million, respectively. The corresponding decreases were in the net presentation of the Company’s debt liability to the current portions of long-term debt and noncurrent long-term debt, respectively. See Note 4, Debt, for further information.

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, which is intended to simplify the presentation of deferred income taxes. During 2016, the Company adopted this ASU. Deferred tax assets in the prior period presented have been reclassified to conform to the current year presentation. See Note 9, Income Taxes, for further information.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments – Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. Among other things, the ASU requires equity investments, with certain exceptions, to be measured at fair value with changes in fair value recognized in net income; simplifies the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment; requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the balance sheet or the accompanying notes to the financial statements; and clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities. The amendments are to be applied by means of a cumulative-effect adjustment to the balance sheet and are effective for interim and annual periods beginning after December 15, 2017. With certain exceptions, early adoption is not permitted. We are currently evaluating the effects ASU 2016-01 will have on our consolidated financial statements and related disclosures. We currently disclose approximately $4.8 million in gross unrealized holdings gains and $0.6 million in gross unrealized holdings losses in Note 1(e), Marketable Securities.

(1)	Summary of Significant Accounting Policies—continued

(w)

Recent Accounting Pronouncements - continued

In February 2016, the FASB issued ASU 2016-02, Leases. The objective of the new standard is to establish principles for lessees and lessors to report information about the amount, timing, and uncertainty of cash flows arising from a lease. The ASU will require a lessee to recognize the assets and liabilities that arise from leases, including operating leases. Under the new requirements, a lessee will recognize in the statement of financial position a liability to make lease payments (the lease liability) and the right-of-use asset representing the right to the underlying asset for the lease term. For leases with a term of 12 months or less, the lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. The standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application of the amendment is permitted. We are currently evaluating the effects ASU 2016-02 will have on our consolidated financial statements and related disclosures. We currently disclose approximately $72.1 million in operating lease obligations in Note 10, Leases. We will evaluate those contracts as well as other existing arrangements to determine if they qualify for lease accounting under the new standard. Upon adoption, we would expect the amount recognized for the right-of-use assets and lease liabilities to be material. We do not plan to early adopt the new standard.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This update simplifies the accounting for goodwill impairments by eliminating step 2 from the goodwill impairment test. Instead, if the carrying amount of a reporting unit exceeds its fair value, and impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The ASU is effective for annual and any interim impairment tests for periods beginning after December 15, 2019. We have not yet selected a transition date nor have we determined the effect of the standard on our ongoing financial reporting.

Business Combinations

12 Months Ended

Dec. 31, 2016

Business Combinations [Abstract]

Business Combinations

(2)	Business Combinations

In September 2014, we acquired certain assets of Bull’s-Eye Express, Inc. and its affiliates (collectively, “Bull’s-Eye”), based in Albany, Missouri for $1.6 million. Bull’s-Eye is a regional provider of industrial equipment transportation and freight consolidation services and is strategically positioned to service customers in the Midwest. As of December 31, 2014, $1.3 million of the purchase price was paid in cash and the remaining $0.3 million consisted of partial forgiveness of a debt due to us. Following the acquisition, Bull’s-Eye operates as part of Universal Truckload, Inc.

The pro forma effect of this acquisition has been omitted, as the effect is immaterial to the Company’s results of operations, financial position and cash flows. The allocation of the purchase price was as follows (in thousands):

Intangible assets	$	1,007
Property and equipment		400
Goodwill (tax deductible)		163
	$	1,570

The intangible assets, which represent Bull’s-Eye’s customer relationships, are being amortized over a period of seven years.

The operating results of Bull’s-Eye have been included in the Consolidated Statements of Income since its acquisition date; however, such operating results have not been separately disclosed as it is deemed immaterial.

Goodwill represents the excess of the purchase price over the estimated fair value assigned to the net tangible and identifiable intangible assets acquired by Universal, and the expected synergies to be achieved through the integration of Bull’s-Eye into Universal.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1524-128463

Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Accounts Receivable

12 Months Ended

Dec. 31, 2016

Receivables [Abstract]

Accounts Receivable

(3)	Accounts Receivable

Accounts receivable amounts appearing in the financial statements include both billed and unbilled receivables. We bill customers in accordance with contract terms, which may result in a brief timing difference between when revenue is recognized and when invoices are rendered. Unbilled receivables, which usually are billed within one month, totaled $16.4 million and $11.8 million at December 31, 2016 and 2015, respectively.

Accounts receivable are presented net of an allowance for doubtful accounts. Following is a summary of the activity in the allowance for doubtful accounts for the years ended December 31 (in thousands):

	2016			2015			2014
Balance at beginning of year	$	5,173		$	5,207		$	2,688
Provision for doubtful accounts		3,099			3,004			3,504
Uncollectible accounts written off		(6,659	)		(3,038	)		(985	)
Balance at end of year	$	1,613		$	5,173		$	5,207

Property and Equipment

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

Property and Equipment

(4)	Property and Equipment

Property and equipment at December 31 consists of the following (in thousands):

	2016			2015
Transportation equipment	$	214,046		$	185,351
Land, buildings and related assets		96,549			73,096
Other operating assets		77,252			66,290
Information technology equipment		19,520			18,660
Construction in process		20,204			5,607
		427,571			349,004
Less accumulated depreciation		(181,294	)		(171,815	)
Total	$	246,277		$	177,189

Accrued Expenses and Other Current Liabilities

12 Months Ended

Dec. 31, 2016

Payables And Accruals [Abstract]

Accrued Expenses and Other Current Liabilities

(5)	Accrued Expenses and Other Current Liabilities

Accrued expenses consist of the following items at December 31 (in thousands):

	2016		2015
Payroll related items	$	8,379	$	6,833
Driver escrow liabilities		7,601		4,486
Commissions, taxes and other		3,685		7,670
Total	$	19,665	$	18,989

Debt

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Debt

(6)

Debt

Debt is comprised of the following (in thousands):

	Interest Rates at		December 31,
	December 31, 2016		2016			2015
Outstanding Debt:
ABL Facility (1)	2.27% to 4.25%		$	71,600		$	59,569
Westport Facility (2)
Term Loan		3.26%		34,000			40,000
Revolver		2.76%		3,000			11,766
Equipment Financing (3)	3.18% to 4.11%			104,607			83,578
Real Estate Financing (4)		3.00%		49,643			—
Margin Facility (5)		1.86%		—			—
Unsecured Loan	NA			—			40,000
Unamortized debt issuance costs				(1,583	)		(1,499	)
				261,267			233,414
Less current portion of long-term debt				34,455			61,224
Total long-term debt, net of current portion			$	226,812		$	172,190

(1) The ABL Facility provides for maximum borrowings of $120 million at a variable rate of interest based on LIBOR or a base rate, and matures on December 23, 2020. The facility, which is secured by cash, deposits and accounts receivable of the borrowing subsidiaries, includes customary affirmative and negative covenants and events of default, as well as financial covenants requiring a minimum fixed charge coverage ratio to be maintained after a triggering event. Interest on base rate advances is payable quarterly, and interest on each LIBOR-based advance is payable on the last day of the applicable interest period. At December 31, 2016, we were in compliance with all covenants under the Facility, and $22.9 million was available for borrowing.

(2) The Westport Facility provides our subsidiary, Westport Axle Corporation, with maximum borrowings of $60 million in the form of a $40 million term loan and a $20 million revolver. Borrowings under the Westport Facility, which matures on December 23, 2020, accrue interest at a variable interest rate based on LIBOR or a base rate, and are secured by all of Westport’s assets. The Company becomes a guarantor upon the occurrence of certain events specified in the Westport Facility. Borrowings are repaid in part quarterly with the balance due at maturity. Interest on base rate advances is payable quarterly, and interest on each LIBOR-based advance is payable on the last day of the applicable interest period. The Westport Facility includes customary affirmative and negative covenants and events of default. At December 31, 2016, we were in compliance with all covenants, and $7.4 million was available for borrowing.

(3) The Equipment Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance transportation equipment. The equipment notes, which are secured by liens on selected titled vehicles, include certain affirmative and negative covenants, are generally payable in 60 monthly installments and bear interest at fixed rates ranging from 3.18% to 4.11%. At December 31, 2016, we were in compliance with all covenants.

(4) The Real Estate Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance certain purchases of real property and refinance a portion of existing indebtedness pursuant to a $40 million unsecured loan. The promissory notes require monthly payments of principal and accrued interest until their maturity on June 30, 2026. The notes are secured by first mortgages and assignment of leases on specific parcels of real estate and improvements included in a collateral pool specified in the security documents. The Real Estate Financing includes an additional promissory note that is secured by other real property and improvements and matures on September 5, 2026. Each of the notes bears interest at LIBOR plus 2.25%. At December 31, 2016, we were in compliance with all covenants.

(5) The Margin Facility is a short-term line of credit secured by our portfolio of marketable securities. It bears interest at LIBOR plus 1.10%. The amount available under the line of credit is based on a percentage of the market value of the underlying securities. We did not have any amounts outstanding under our line of credit at December 31, 2016 or 2015, and the maximum available borrowings under the line of credit were $7.0 million and $7.4 million, respectively.

(6)	Debt—continued

The following table reflects the maturities of our principal repayment obligations as of December 31, 2016 (in thousands):

Years Ending December 31	ABL Facility		Westport Facility - Term Loan		Westport Facility - Revolver		Equipment Financing		Real Estate Financing		Total
2017	$	—	$	6,000	$	—	$	23,525	$	5,176	$	34,701
2018		—		6,000		—		24,440		5,176		35,616
2019		—		6,000		—		25,312		5,176		36,488
2020		71,600		16,000		3,000		26,217		5,176		121,993
2021		—		—		—		5,025		5,175		10,200
Thereafter		—		—		—		88		23,764		23,852
Total	$	71,600	$	34,000	$	3,000	$	104,607	$	49,643	$	262,850

The Company is also party to three interest rate swap agreements that qualify for hedge accounting. The swap agreements were executed to fix a portion of the interest rates on its variable rate debt that have a combined notional amount of $27.7 million at December 31, 2016. Under two of the swap agreements, the Company receives interest at the one-month LIBOR rate plus 2.25%, and pays a fixed rate. The March 2016 swap (swap A) became effective October 2016, has a rate of 4.16% (amortizing notional amount of $10.0 million) and expires July 2026, and an additional March 2016 swap (swap B) became effective October 2016, has a rate of 3.83% (amortizing notional amount of $5.7 million) and expires May 2022. The third interest rate swap agreement (swap C) has a notional amount of $12.0 million and expires February 2018. Under swap C, the Company receives interest at the one-month LIBOR rate, and pays a fixed rate of 0.78%. At December 31, 2016, the fair value of the three swap agreements was an asset of $0.2 million. Since these swap agreements qualify for hedge accounting, the changes in fair value are recorded in other comprehensive income (loss), net of tax. See Note 7 for additional information pertaining to interest rate swaps.

Fair Value Measurement and Disclosures

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurement and Disclosures

(7)	Fair Value Measurement and Disclosures

ASC Topic 820, “Fair Value Measurements and Disclosures”, defines fair value as the exchange price that would be received for an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date and expanded disclosures with respect to fair value measurements.

ASC Topic 820 also establishes a three-level fair value hierarchy that prioritizes the inputs used to measure fair value. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

•

Level 1 — Quoted prices in active markets for identical assets or liabilities.

•

Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

•

Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies and similar techniques that use significant unobservable inputs.

(7)	Fair Value Measurement and Disclosures—continued

We have segregated all financial assets that are measured at fair value on a recurring basis into the most appropriate level within the fair value hierarchy based on the inputs used to determine the fair value at the measurement date in the tables below (in thousands):

	December 31, 2016
	Level 1		Level 2		Level 3		Fair Value Measurement
Assets
Cash equivalents	$	4	$	—	$	—	$	4
Marketable securities		14,359		—		—		14,359
Interest rate swaps		—		161		—		161
Total Assets	$	14,363	$	161	$	—	$	14,524

	December 31, 2015
	Level 1		Level 2		Level 3		Fair Value Measurement
Assets
Cash equivalents	$	96	$	—	$	—	$	96
Marketable securities		13,431		—		—		13,431
Total Assets	$	13,527	$	—	$	—	$	13,527

The valuation techniques used to measure fair value for the items in the tables above are as follows:

•

Cash equivalents – This category consists of money market funds which are listed as Level 1 assets and measured at fair value based on quoted prices for identical instruments in active markets.

•

Marketable securities – Marketable securities represent equity securities, which consist of common and preferred stocks, are actively traded on public exchanges and are listed as Level 1 assets. Fair value was measured based on quoted prices for these securities in active markets.

•

Interest rate swaps - The fair value of our interest rate swaps, as provided by a third party service provider, is determined using a methodology of netting the discounted future fixed cash payments (or receipts) and the discounted expected variable cash receipts (or payments). The variable cash receipts (or payments) are based on the expectation of future interest rates (forward curves) derived from observed market interest rate curves. The fair value measurement also incorporates credit valuation adjustments to appropriately reflect both the Company’s nonperformance risk and the respective counterparty’s nonperformance risk.

Our revolving credit and term loan agreements and our real estate promissory notes all consists of variable rate borrowings. We categorize borrowings under these credit agreements as Level 2 in the fair value hierarchy. The carrying value of these borrowings approximate fair value because the applicable interest rates are adjusted frequently based on short-term market rates.

For our equipment promissory notes with fixed rates, the fair values are estimated using discounted cash flow analyses, based on our current incremental borrowing rates for similar types of borrowing arrangements. We categorize borrowings under this credit agreement as Level 2 in the fair value hierarchy. The carrying values and estimated fair values of these promissory notes at December 31, 2016 is summarized as follows:

2016

Carrying Value

Estimated Fair

Value

Equipment promissory notes

104,607

104,433

We have not elected the fair value option for any of our financial instruments.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Transactions with Affiliates

12 Months Ended

Dec. 31, 2016

Transactions with Affiliates

(8)	Transactions with Affiliates

CenTra, Inc., an affiliate of the Company, provides administrative support services to Universal in the ordinary course of business, including legal, human resources, tax, and IT infrastructure and related services. The cost of these services is based on the actual or estimated utilization of the specific service.

Universal also purchases other services from affiliates. Following is a schedule of cost incurred and included in operating expenses for services provided by affiliates for the years ended December 31 (in thousands):

	2016		2015		2014
Administrative support services	$	2,638	$	3,234	$	2,459
Truck fuel, tolls and maintenance		2,656		2,523		1,320
Real estate rent and related costs		17,174		13,174		10,472
Insurance and employee benefit plans		44,548		46,173		36,073
Contracted transportation services		233		969		930
Total	$	67,249	$	66,073	$	51,254

We pay CenTra the direct variable cost of maintenance, fueling and other operational support costs for services delivered at our affiliate’s trucking terminals that are geographically remote from our own facilities. Such costs are billed when incurred, paid on a routine basis, and reflect actual labor utilization, repair parts costs or quantities of fuel purchased. In connection with our transportation services, we also pay tolls and other fees for international bridge crossings to certain related entities which are under common control with CenTra.

A significant number of our operating locations are located in facilities leased from affiliates. At 36 facilities, occupancy is based on either month-to-month or contractual, multi-year lease arrangements which are billed and paid monthly. Leasing properties provided by an affiliate that owns a substantial commercial property portfolio affords us significant operating flexibility. However, we are not limited to such arrangements. See Note 10, “Leases” for further information regarding the cost of leased properties.

We purchase workers’ compensation, property and casualty, cargo, warehousing and other general liability insurance from an insurance company controlled by our majority shareholders. Our employee health care benefits and 401(k) programs are also provided by this affiliate.

Other services from affiliates, including contracted transportation services, are delivered to us on a per-transaction-basis or pursuant to separate contractual arrangements provided in the ordinary course of business. At December 31, 2016 and 2015, amounts due to affiliates were $4.6 million and $3.4 million, respectively. In our Consolidated Balance Sheets, we record our insured claims liability and the related recovery from an affiliate insurance provider in insurance and claims, and other receivables. At December 31, 2016 and 2015, there were $8.7 million and $11.5 million, respectively, included in each of these accounts for insured claims.

We contracted with an affiliate to provide real property improvements to us totaling $1.0 million during 2016. We also purchased from an affiliate $2.3 million of wheels and tires for new trailering equipment and an additional $0.2 million in revenue equipment components during the same period. During 2015, we purchased used snow removal equipment from an affiliate for $18,000.

We periodically use the law firm of Sullivan Hincks & Conway to provide legal services. Daniel C. Sullivan, a member of our Board, is a partner at Sullivan Hincks & Conway. Not included in the table above are amounts paid for legal services during 2015 and 2014 were $1,500 and $92,000, respectively. No amounts were paid for legal services during 2016.

Effective August 4, 2016, we exercised our right of first refusal to acquire 1,600 shares of restricted stock from our former CFO, David A. Crittenden, for $23,856 based on the closing market price on the effective date of the transaction.

On August 8, 2016, we purchased from a subsidiary of CenTra, Crown Enterprises, Inc., for a multi-building, cross-dock logistics terminal located in Romulus, Michigan. The purchase price, which was established by an independent third party appraisal, was $22.5 million payable pursuant to a promissory note issued to Crown. At December 31, 2016, the promissory note was fully repaid.

(8)	Transactions with Affiliates—continued

Services provided by Universal to Affiliates

We periodically assist our affiliates by providing selected transportation and logistics services in connection with their specific customer contracts or purchase orders. Truck fueling and administrative expenses are presented net in operating expense. Following is a schedule of services provided to CenTra and affiliates for the years ended December 31 (in thousands):

	2016		2015		2014
Purchased transportation and equipment rent	$	1,090	$	400	$	308
Fueling, maintenance and other support services		—		—		158
Total	$	1,090	$	400	$	466

At December 31, 2016 and 2015, amounts due from affiliates were $2.5 million and $1.9 million, respectively.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Income Taxes

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Income Taxes

(9)	Income Taxes

A summary of income (loss) related to U.S. and non-U.S. operations are as follows (in thousands):

	Year Ended December 31,
	2016			2015		2014
Operations
U.S. Domestic	$	40,172		$	62,781	$	70,079
Foreign		(767	)		2,224		3,020
Total pre-tax income	$	39,405		$	65,005	$	73,099

The provision for income taxes attributable to income from continuing operations for the years ended December 31 consists of the following (in thousands):

	2016		2015			2014
Current:
U.S. Federal	$	7,432	$	19,544		$	20,822
State		748		4,469			4,838
Foreign		284		449			590
		8,464		24,462			26,250
Deferred:
U.S. Federal		6,521		1,183			489
State		140		(730	)		891
Foreign		36		89			99
		6,697		542			1,479
Total	$	15,161	$	25,004		$	27,729

During 2016, the Company adopted Accounting Standards Update 2015-17 – Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”), which requires an entity to present deferred tax assets and deferred tax liabilities as noncurrent in a classified balance sheet. As a result of the adoption, the Company reclassified $6.3 million of current deferred tax assets to noncurrent deferred income tax liabilities, and additional $0.1 million of current deferred tax assets to noncurrent deferred assets to conform to the current year presentation.

(9)	Income Taxes—continued

Deferred income tax assets and liabilities at December 31 consist of the following (in thousands):

	2016			2015
Domestic deferred tax assets:
Allowance for doubtful accounts	$	633		$	1,809
Other assets		2,792			4,434
Accrued expenses		5,384			4,868
Total domestic deferred tax assets	$	8,809		$	11,111
Domestic deferred tax liabilities:
Prepaid expenses	$	144		$	383
Marketable securities		1,613			1,060
Intangible assets		13,341			15,987
Property and equipment		41,530			34,177
Total domestic deferred tax liabilities	$	56,628		$	51,607
Net domestic deferred tax liabilities	$	47,819		$	40,496
Foreign deferred tax asset
Other assets	$	571		$	489
Valuation allowance - foreign		(407	)		(406	)
Total foreign deferred tax asset	$	164		$	83
Net deferred tax liability	$	47,655		$	40,413

In assessing whether deferred tax assets may be realized in the future, management considers whether it is more likely than not that some portion of such tax assets will not be realized. The deferred tax assets and liabilities were reviewed separately by jurisdictions when measuring the need for valuation allowances. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income (both ordinary income and taxable capital gains) during the periods in which those temporary differences reverse. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. Valuation allowances are established when necessary to reduce deferred tax assets when it is more likely than not that a portion or all of the deferred tax assets will not be realized. Based upon the level of historical taxable income, reversal of existing taxable temporary differences, projections for future taxable income over the periods in which the domestic deferred tax assets are expected to reverse, and our ability to generate future capital gains, management believes it is more likely than not that we will realize the benefits of these deductible differences. Thus, no valuation allowance has been established for the domestic deferred tax assets. Based on the anticipated earnings projections of the foreign subsidiaries, management has recorded a full valuation allowance for the deferred tax assets associated with a German subsidiary.

We have not provided for U.S. income taxes on foreign subsidiaries undistributed earnings since they are expected to be reinvested indefinitely outside the U.S. It is not possible to predict the amount of U.S. income taxes that might be payable if these earnings are eventually repatriated. As of December 31, 2016, the undistributed earnings of foreign subsidiaries were approximately $8.7 million.

Income tax expense attributable to income from continuing operations differs from the statutory rates as follows:

	2016			2015			2014
Federal statutory rate		35	%		35	%		35	%
Non-deductible (benefit) expense		0	%		0	%		-2	%
State, net of federal benefit		2	%		4	%		5	%
Foreign		1	%		-1	%		0	%
Effective tax rate		38	%		38	%		38	%

(9)	Income Taxes—continued

As of December 31, 2016, the total amount of unrecognized tax benefit representing uncertainty in certain tax positions was $0.4 million. These uncertain tax positions are based on recognition thresholds and measurement attributes for the financial statement recognition and measurements of a tax position taken or expected to be taken in a tax return. Any prospective adjustments to our accrual for uncertain tax positions will be recorded as an increase or decrease to the provision for income taxes and would impact our effective tax rate. At December 31, 2016, there are no positions for which it is reasonably possible that the total amounts of unrecognized tax benefits would significantly increase or decrease within 12 months. As of December 31, 2016, the amount of accrued interest and penalties was $0.1 million and $0.1 million, respectively.

The changes in our gross unrecognized tax benefits during the years ended December 31 are as follows (in thousands):

	2016			2015			2014
Unrecognized tax benefit – beginning of year	$	333		$	414		$	652
Increases related to prior year tax positions		24			42			4
Increases related to current year tax positions		95			6			13
Decreases related to prior year tax positions		(36	)		(129	)		(255	)
Unrecognized tax benefit – end of year	$	416		$	333		$	414

Leases

12 Months Ended

Dec. 31, 2016

Leases [Abstract]

Leases

(10)

Leases

We lease office space, warehouses, freight distribution centers, terminal yards and equipment under non-cancelable capital and operating lease arrangements. Except where we deliver services within facilities provided by our customers, we lease warehouse and freight distribution centers used in our logistics operations, often in connection with a specific customer program. Where facilities are substantially dedicated to a single customer and our lease is with an independent property owner, we attempt to align lease terms with the expected duration of the underlying customer program.

In most cases, we expect our facility leases will be renewed or replaced by other leases in the ordinary course of business. Where possible, we contractually secure the recovery of certain occupancy costs, including rent, during the term of a customer program. Future minimum rental payments pursuant to leases that have an initial or remaining non-cancelable lease term in excess of one year as of December 31, 2016 are as follows (in thousands):

			Operating Leases
Years Ending December 31	Capital Leases		With Affiliates		With Third Parties		Total
2017	$	106	$	12,831	$	9,154	$	22,091
2018		95		9,032		5,143		14,270
2019		—		7,513		2,876		10,389
2020		—		5,520		2,162		7,682
2021		—		4,898		400		5,298
Thereafter		—		12,582		—		12,582
Total required payments		201	$	52,376	$	19,735	$	72,312
Less amounts representing interest (3.8% to 4.0%)		9
Present value of minimum lease payments		192
Less current maturities		100
	$	92

At December 31, 2016 and 2015, assets under capital leases, consisting primarily of vehicles, machinery and equipment, had a cost of approximately $0.5 million and $5.4 million, respectively, and accumulated amortization of $0.3 million and $1.5 million, respectively. Included in depreciation and amortization expense in the accompanying Consolidated Statements of Income for the years ended December 31, 2016, 2015 and 2014 is amortization expense associated with the capital leases of $0.1 million, $0.9 million and $0.8 million, respectively.

(10)	Leases—continued

Rental expense for facilities, vehicles and other equipment leased from third parties under operating leases approximated $20.2 million, $19.2 million and $21.9 million for the years ended December 31, 2016, 2015 and 2014.

- Definition

The entire disclosure for lessor entity's leasing arrangements for operating, capital and leveraged leases.

+ References + Details

Comprehensive Income

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Comprehensive Income

(11)	Comprehensive Income

Comprehensive income includes the following for the years ended December 31 (in thousands):

	2016			2015			2014
Unrealized holding (losses) gains on available-for-sale securities arising during the period:
Gross amount	$	1,787		$	(1,597	)	$	620
Income tax (expense) benefit		(645	)		582			(208	)
Net of tax amount	$	1,142		$	(1,015	)	$	412
Realized (gains) on available-for-sale securities reclassified into income:
Realized gains on sales of available-for-sale securities	$	(412	)	$	(347	)	$	—
Other-than-temporary impairment losses		—			230			—
Total before tax		(412	)		(117	)		—
Income tax expense		148			45			—
Net of tax amount	$	(264	)	$	(72	)	$	—
Unrealized holding gains on interest rate swaps arising during the period:
Gross amount	$	161		$	—		$	—
Income tax expense		(62	)		—			—
Net of tax amount	$	99		$	—		$	—
Foreign currency translation adjustments	$	(1,161	)	$	(2,252	)	$	(1,631	)

The unrealized holding gains and losses on available-for-sale investments represent mark-to-market adjustments net of related income taxes.

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 17
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 220
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Paragraph 14
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

+ Details

Retirement Plans

12 Months Ended

Dec. 31, 2016

Compensation And Retirement Disclosure [Abstract]

Retirement Plans

(12)	Retirement Plans

We offer 401(k) defined contribution plans to our employees. The plans are administered by a company controlled by our principal shareholders and include different matching provisions depending on which subsidiary or affiliate is involved. In the plans available to certain employees not subject to collective bargaining agreements, we matched contributions up to $600 annually for each employee who is not considered highly compensated through December 31, 2008, after which some matching contributions were suspended as a response to market conditions at certain subsidiaries. Three other 401(k) plans are provided to employees of specific operations and offer matching contributions that range from zero to $2,080 per participant annually. The total expense for contributions for 401(k) plans, including plans related to collective bargaining agreements, was $0.5 million, $0.2 million and $0.4 million for the years ended December 31, 2016, 2015 and 2014, respectively.

In connection with a collective bargaining agreement that covered 12 Canadian employees at December 31, 2016, we are required to make defined contributions into the Canada Wide Industrial Pension Plan. At December 31, 2016 and 2015, the required contributions totaled approximately $31,000 and $38,000, respectively.

Stock Based Compensation

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Based Compensation

(13)	Stock Based Compensation

On April 23, 2014, our Board of Directors adopted the 2014 Amended and Restated Stock Incentive Plan, or the Plan. The Plan was approved by our shareholders at the 2014 Annual Meeting and became effective as of the date it was adopted by the Board of Directors. The Plan replaced our 2004 Stock Incentive Plan and carried forward the shares of common stock that remained available for issuance under the 2004 Stock Incentive Plan. The grants may be made in the form of stock options, restricted stock bonuses, restricted stock purchase rights, stock appreciation rights, phantom stock units, restricted stock units or unrestricted common stock. Restricted stock awards currently outstanding under the 2004 Stock Incentive Plan will remain outstanding in accordance with the terms of that plan.

On February 24, 2016, April 29, 2015 and March 5, 2015, the Company granted 10,000, 20,000 and 10,000 shares, respectively, of restricted stock to its Chief Executive Officer. The restricted stock grants have fair values of $15.55 per share, $22.03 per share, and $25.18 per share, respectively, based on the closing price of the Company’s stock on each grant date. The shares vested 25% immediately on the grant dates, and an additional 25% will vest in three equal installments with the final vesting on March 5, 2019, subject to continued employment with the company.

On December 23, 2015, the Company granted 50,000 shares of restricted stock to certain of its employees, including 5,000 shares to its Chief Financial Officer. The restricted stock grants have a grant date fair value of $14.93 per share, based on the closing price of the Company’s stock, of which 25% vested immediately, and an additional 25% will vest in three equal increments on each December 20 in 2016, 2017 and 2018.

On December 20, 2012, the Company granted 178,137 shares of restricted stock to certain of its employees. The restricted stock grants had a grant date fair value of $16.42 per share, based on the closing price of the Company’s stock, of which 25% vested immediately and an additional 20% vested on each anniversary of the grant through December 20, 2016.

A grantee’s vesting of restricted stock awards may be accelerated under certain conditions, including retirement.

A summary of the status of our non-vested shares as of December 31, 2016, and changes during the year ended December 31, 2016, is presented below:

	Shares			Weighted Average Grant Date Fair Value
Non-vested at January 1, 2016		68,225		$	17.80
Granted		10,000		$	15.55
Vested		(33,225	)	$	17.19
Forfeited		—		$	—
Balance at December 31, 2016		45,000		$	17.75

During the years ended December 31, 2016, 2015 and 2014, the total grant date fair value of vested shares recognized as compensation cost was $0.6 million, $0.5 million and $1.5 million, respectively. As of December 31, 2016, there was $0.8 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements granted under the Plan. That cost is expected to be recognized on a straight-line basis over the remaining vesting period. As a result, the Company expects to recognize stock-based compensation costs of $0.4 million, $0.3 million, and $0.1 million during 2017, 2018 and 2019, respectively.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2016

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

(14)	Commitments and Contingencies

Our principal commitments relate to long-term real estate leases and payment obligations to equipment vendors.

We are involved in certain claims and pending litigation arising from the ordinary conduct of business. We also provide accruals for claims within our self-insured retention amounts. Based on the knowledge of the facts, and in certain cases, opinions of outside counsel, in the Company’s opinion the resolution of these claims and pending litigation will not have a material effect on our financial position, results of operations or cash flows.

At December 31, 2016, approximately 31% of our employees in the United States, Canada and Colombia, and 94% of our employees in Mexico are subject to collective bargaining agreements that are renegotiated periodically, 18% of which are subject to contracts that expire in 2017.

Earnings Per Share

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Earnings Per Share

(15)	Earnings Per Share

Basic earnings per common share amounts are based on the weighted average number of common shares outstanding, excluding outstanding non-vested restricted stock. Diluted earnings per common share include dilutive common stock equivalents determined by the treasury stock method. For the years ended December 31, 2016, 2015 and 2014, there were zero, 2,273 and 31,230 weighted average non-vested shares of restricted stock, respectively, included in the denominator for the calculation of diluted earnings per share.

For the years ended December 31, 2016 and 2015, 45,000 and 30,725 shares of non-vested restricted stock, respectively, were excluded from the calculation of diluted earnings per share because such shares were anti-dilutive. No shares were excluded from the calculation of diluted earnings per share for the year ended December 31, 2014.

Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (unaudited)

(16)	Quarterly Financial Data (unaudited)

	2016
	1^st quarter		2^nd quarter		3^rd quarter		4^th quarter
	(in thousands, except per share information)
Operating revenue	$	260,394	$	276,813	$	271,493	$	264,051
Operating income		13,930		16,774		10,027		5,849
Income before income taxes		12,105		14,771		8,119		4,410
Provision for income taxes		4,628		5,724		3,122		1,687
Net income	$	7,477	$	9,047	$	4,997	$	2,723
Earnings per common share:
Basic	$	0.26	$	0.32	$	0.18	$	0.10
Diluted	$	0.26	$	0.32	$	0.18	$	0.10
Weighted average number of common shares outstanding:
Basic		28,402		28,414		28,413		28,415
Diluted		28,402		28,414		28,413		28,415

	2015
	1^st quarter		2^nd quarter		3^rd quarter		4^th quarter
	(in thousands, except per share information)
Operating revenue	$	263,561	$	295,007	$	284,214	$	285,991
Operating income		15,067		22,920		16,944		18,464
Income before income taxes		13,332		21,584		15,001		15,088
Provision for income taxes		5,168		8,300		5,754		5,782
Net income	$	8,164	$	13,284	$	9,247	$	9,306
Earnings per common share:
Basic	$	0.27	$	0.44	$	0.32	$	0.33
Diluted	$	0.27	$	0.44	$	0.32	$	0.33
Weighted average number of common shares outstanding:
Basic		29,992		29,979		28,661		28,380
Diluted		29,998		29,980		28,661		28,382

Segment Reporting

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Segment Reporting

(17)	Segment Reporting

(17)	Segment Reporting—continued

The following tables summarize information about our reportable segments as of and for the fiscal years ended December 31, 2016, 2015 and 2014 (in thousands):

2016	Transportation		Logistics		Other			Total
Operating revenues	$	656,496	$	414,948	$	1,307		$	1,072,751
Eliminated inter-segment revenues		1,896		7,482		—			9,378
Depreciation and amortization		13,459		23,064		179			36,702
Income from operations		22,399		27,653		(3,472	)		46,580
Capital expenditures		9,464		91,045		500			101,009
Total assets		252,164		292,227		26,066			570,457

2015	Transportation		Logistics		Other			Total
Operating revenues	$	721,437	$	406,822	$	514		$	1,128,773
Eliminated inter-segment revenues		3,659		6,170		—			9,829
Depreciation and amortization		11,153		23,565		155			34,873
Income from operations		28,683		43,848		864			73,395
Capital expenditures		2,034		23,797		426			26,257
Total assets		219,759		253,429		29,967			503,155

2014	Transportation		Logistics		Other			Total
Operating revenues	$	778,603	$	412,507	$	411		$	1,191,521
Eliminated inter-segment revenues		5,160		7,473		—			12,633
Depreciation and amortization		11,256		21,507		290			33,053
Income from operations		34,931		50,892		(4,988	)		80,835
Capital expenditures		16,444		42,413		927			59,784
Total assets		246,190		247,155		35,669			529,014

We provide a portfolio of transportation and logistics services to a wide range of customers throughout the United States and in Mexico, Canada and Colombia. Revenues for selected services as provided to the chief operating decision maker are as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Transportation services	$	629,192	$	696,134	$	769,308
Value-added services		302,225		285,258		284,496
Intermodal services		141,334		147,381		137,717
Total	$	1,072,751	$	1,128,773	$	1,191,521

Revenues attributed to geographic areas are as follows (in thousands).

	Year Ended December 31,
	2016		2015		2014
United States	$	1,038,963	$	1,090,683	$	1,156,875
Mexico		20,046		27,676		24,860
Canada		12,157		8,577		9,786
Colombia		1,585		1,837		—
Total	$	1,072,751	$	1,128,773	$	1,191,521

(17)	Segment Reporting—continued

Net long-lived property and equipment assets are presented in the table below (in thousands):

	Year Ended December 31,
	2016		2015
United States	$	233,644	$	173,009
Mexico		12,188		3,674
Canada		431		500
Colombia		14		6
Total	$	246,277	$	177,189

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8864-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599

+ Details

Subsequent Events

12 Months Ended

Dec. 31, 2016

Subsequent Events [Abstract]

Subsequent Events

(18)	Subsequent Events

On February 23, 2017, our Board of Directors declared a quarterly cash dividend of $0.07 per share of common stock, which is payable to shareholders of record at the close of business on March 6, 2017 and is expected to be paid on March 16, 2017. Declaration of future cash dividends is subject to final determination by the Board of Directors each quarter after its review of our financial condition, results of operations, capital requirements, any legal or contractual restrictions on the payment of dividends and other factors the Board of Directors deems relevant.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Basis of Presentation

(b)

Basis of Presentation

Our fiscal year consists of four quarters, each with thirteen weeks.

Certain immaterial reclassifications have been made to the prior financial statements in order for them to conform to the December 31, 2016 presentation.

Use of Estimates

(c)

Use of Estimates

Cash and Cash Equivalents

(d)

Cash and Cash Equivalents

Marketable Securities

(e)

Marketable Securities

(1)	Summary of Significant Accounting Policies—continued

(e)

Marketable Securities—continued

The cost, gross unrealized holding gains, gross unrealized holding losses, and fair value of available-for-sale securities by type were as follows (in thousands):

	Cost		Gross unrealized holding gains		Gross unrealized holding (losses)			Fair Value
At December 31, 2016
Equity Securities	$	10,168	$	4,780	$	(589	)	$	14,359
At December 31, 2015
Equity Securities	$	10,614	$	3,958	$	(1,141	)	$	13,431

	Less than 12 Months				12 Months or Greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
At December 31, 2016
Equity securities	$	426	$	41	$	2,438	$	548	$	2,864	$	589
At December 31, 2015
Equity securities	$	3,099	$	987	$	345	$	154	$	3,444	$	1,141

Accounts Receivable

(f)

Accounts Receivable

Inventories

(g)

Inventories

At December 31, inventory consists of the following (in thousands):

	2016		2015
Raw materials and supplies	$	7,077	$	7,660
Finished goods		1,540		962
	$	8,617	$	8,622

Property and Equipment

(h)

Property and Equipment

Description		Life in Years
Transportation equipment		3 - 15
Other operating assets		3 - 15
Information technology equipment		3 - 5
Buildings and related assets		10 - 39

The amounts recorded for depreciation expense were $29.2 million, $25.8 million, and $23.1 million for the years ended December 31, 2016, 2015 and 2014, respectively.

Intangible Assets

(i)

Intangible Assets

Our identifiable intangible assets as of December 31, 2016 and 2015 are as follows (in thousands):

	2016			2015
Indefinite Lived Intangibles:
Trademarks	$	2,500		$	2,500
Definite Lived Intangibles:
Agent and customer relationships		65,060			65,060
Customer contracts		20,600			20,600
Less: accumulated amortization		(50,971	)		(43,495	)
Intangible assets, net	$	34,689		$	42,165
Total Identifiable Intangible Assets	$	37,189		$	44,665

Estimated amortization expense by year is as follows (in thousands):

2017	$	5,995
2018		2,517
2019		2,265
2020		1,970
2021		1,959
Thereafter		19,983
Total	$	34,689

The amounts recorded for amortization expense were $7.5 million, $9.2 million, and $9.9 million for the years ended December 31, 2016, 2015 and 2014, respectively.

Goodwill

(j)

Goodwill

(1)	Summary of Significant Accounting Policies—continued

(j)

Goodwill—continued

At both December 31, 2016 and 2015, the carrying amount of goodwill was $74.5 million, of which $18.2 million was recorded in our transportation segment and $56.3 million in our logistics segment.

Long-Lived Assets

(k)

Long-Lived Assets

Contingent Consideration

(l)

Contingent Consideration

Fair Value of Financial Instruments

(m)

Fair Value of Financial Instruments

Deferred Compensation

(n)

Deferred Compensation

Closing Costs

(1)	Summary of Significant Accounting Policies—continued

(o)

Closing Costs

Revenue and Related Expenses

(p)

Revenue and Related Expenses

Insurance & Claims

(q)

Insurance & Claims

(1)	Summary of Significant Accounting Policies—continued

(q)

Insurance & Claims—continued

Our insurance expense varies primarily based upon the frequency and severity of our accident experience, insurance rates, coverage limits, and self-insured retention amounts.

Stock Based Compensation

(r)

Stock Based Compensation

Income Taxes

(s)

Income Taxes

Foreign Currency Translation

(t)

Foreign Currency Translation

Segment Information

(u)

Segment Information

Concentrations of Credit Risk

(1)	Summary of Significant Accounting Policies—continued

(v)

Concentrations of Credit Risk

Recent Accounting Pronouncements

(w)

Recent Accounting Pronouncements

(1)	Summary of Significant Accounting Policies—continued

(w)

Recent Accounting Pronouncements - continued

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Cost, Gross Unrealized Holding Gains Losses, and Fair Value of Available-for-Sale Securities

The cost, gross unrealized holding gains, gross unrealized holding losses, and fair value of available-for-sale securities by type were as follows (in thousands):

	Cost		Gross unrealized holding gains		Gross unrealized holding (losses)			Fair Value
At December 31, 2016
Equity Securities	$	10,168	$	4,780	$	(589	)	$	14,359
At December 31, 2015
Equity Securities	$	10,614	$	3,958	$	(1,141	)	$	13,431

Schedule of Gross Unrealized Holding Losses and Fair Value of Marketable Securities

	Less than 12 Months				12 Months or Greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
At December 31, 2016
Equity securities	$	426	$	41	$	2,438	$	548	$	2,864	$	589
At December 31, 2015
Equity securities	$	3,099	$	987	$	345	$	154	$	3,444	$	1,141

Schedule of Inventories

At December 31, inventory consists of the following (in thousands):

	2016		2015
Raw materials and supplies	$	7,077	$	7,660
Finished goods		1,540		962
	$	8,617	$	8,622

Estimated Useful Lives of Assets

Description		Life in Years
Transportation equipment		3 - 15
Other operating assets		3 - 15
Information technology equipment		3 - 5
Buildings and related assets		10 - 39

Schedule of Identifiable Intangible Assets

Our identifiable intangible assets as of December 31, 2016 and 2015 are as follows (in thousands):

	2016			2015
Indefinite Lived Intangibles:
Trademarks	$	2,500		$	2,500
Definite Lived Intangibles:
Agent and customer relationships		65,060			65,060
Customer contracts		20,600			20,600
Less: accumulated amortization		(50,971	)		(43,495	)
Intangible assets, net	$	34,689		$	42,165
Total Identifiable Intangible Assets	$	37,189		$	44,665

Estimated Amortization Expense by Year

Estimated amortization expense by year is as follows (in thousands):

2017	$	5,995
2018		2,517
2019		2,265
2020		1,970
2021		1,959
Thereafter		19,983
Total	$	34,689

Business Combinations (Tables)

12 Months Ended

Dec. 31, 2016

Bull's-Eye Express, Inc. [Member]

Schedule of Allocation of Purchase Price

Intangible assets	$	1,007
Property and equipment		400
Goodwill (tax deductible)		163
	$	1,570

Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2016

Receivables [Abstract]

Summary of Activity in Allowance for Doubtful Accounts

Following is a summary of the activity in the allowance for doubtful accounts for the years ended December 31 (in thousands):

	2016			2015			2014
Balance at beginning of year	$	5,173		$	5,207		$	2,688
Provision for doubtful accounts		3,099			3,004			3,504
Uncollectible accounts written off		(6,659	)		(3,038	)		(985	)
Balance at end of year	$	1,613		$	5,173		$	5,207

Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment at December 31 consists of the following (in thousands):

	2016			2015
Transportation equipment	$	214,046		$	185,351
Land, buildings and related assets		96,549			73,096
Other operating assets		77,252			66,290
Information technology equipment		19,520			18,660
Construction in process		20,204			5,607
		427,571			349,004
Less accumulated depreciation		(181,294	)		(171,815	)
Total	$	246,277		$	177,189

Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Payables And Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses consist of the following items at December 31 (in thousands):

	2016		2015
Payroll related items	$	8,379	$	6,833
Driver escrow liabilities		7,601		4,486
Commissions, taxes and other		3,685		7,670
Total	$	19,665	$	18,989

Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Details of Debt

Debt is comprised of the following (in thousands):

	Interest Rates at		December 31,
	December 31, 2016		2016			2015
Outstanding Debt:
ABL Facility (1)	2.27% to 4.25%		$	71,600		$	59,569
Westport Facility (2)
Term Loan		3.26%		34,000			40,000
Revolver		2.76%		3,000			11,766
Equipment Financing (3)	3.18% to 4.11%			104,607			83,578
Real Estate Financing (4)		3.00%		49,643			—
Margin Facility (5)		1.86%		—			—
Unsecured Loan	NA			—			40,000
Unamortized debt issuance costs				(1,583	)		(1,499	)
				261,267			233,414
Less current portion of long-term debt				34,455			61,224
Total long-term debt, net of current portion			$	226,812		$	172,190

Summary of Maturities of Principal Repayment Obligations

The following table reflects the maturities of our principal repayment obligations as of December 31, 2016 (in thousands):

Years Ending December 31	ABL Facility		Westport Facility - Term Loan		Westport Facility - Revolver		Equipment Financing		Real Estate Financing		Total
2017	$	—	$	6,000	$	—	$	23,525	$	5,176	$	34,701
2018		—		6,000		—		24,440		5,176		35,616
2019		—		6,000		—		25,312		5,176		36,488
2020		71,600		16,000		3,000		26,217		5,176		121,993
2021		—		—		—		5,025		5,175		10,200
Thereafter		—		—		—		88		23,764		23,852
Total	$	71,600	$	34,000	$	3,000	$	104,607	$	49,643	$	262,850

Fair Value Measurement and Disclosures (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Financial Assets Measured at Fair Value on Recurring Basis

	December 31, 2016
	Level 1		Level 2		Level 3		Fair Value Measurement
Assets
Cash equivalents	$	4	$	—	$	—	$	4
Marketable securities		14,359		—		—		14,359
Interest rate swaps		—		161		—		161
Total Assets	$	14,363	$	161	$	—	$	14,524

	December 31, 2015
	Level 1		Level 2		Level 3		Fair Value Measurement
Assets
Cash equivalents	$	96	$	—	$	—	$	96
Marketable securities		13,431		—		—		13,431
Total Assets	$	13,527	$	—	$	—	$	13,527

Summary of Carrying Values and Estimated Fair Values of Promissory Notes

The carrying values and estimated fair values of these promissory notes at December 31, 2016 is summarized as follows:

2016

Carrying Value

Estimated Fair

Value

Equipment promissory notes

104,607

104,433

Transactions with Affiliates (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Amounts Charged to UTSI

Following is a schedule of cost incurred and included in operating expenses for services provided by affiliates for the years ended December 31 (in thousands):

	2016		2015		2014
Administrative support services	$	2,638	$	3,234	$	2,459
Truck fuel, tolls and maintenance		2,656		2,523		1,320
Real estate rent and related costs		17,174		13,174		10,472
Insurance and employee benefit plans		44,548		46,173		36,073
Contracted transportation services		233		969		930
Total	$	67,249	$	66,073	$	51,254

Schedule of Services Provided to Affiliates

Following is a schedule of services provided to CenTra and affiliates for the years ended December 31 (in thousands):

	2016		2015		2014
Purchased transportation and equipment rent	$	1,090	$	400	$	308
Fueling, maintenance and other support services		—		—		158
Total	$	1,090	$	400	$	466

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Summary of Income (Loss) Related to U.S. and Non-U.S. Operations

A summary of income (loss) related to U.S. and non-U.S. operations are as follows (in thousands):

	Year Ended December 31,
	2016			2015		2014
Operations
U.S. Domestic	$	40,172		$	62,781	$	70,079
Foreign		(767	)		2,224		3,020
Total pre-tax income	$	39,405		$	65,005	$	73,099

Provision for Income Taxes Attributable to Income from Continuing Operations

The provision for income taxes attributable to income from continuing operations for the years ended December 31 consists of the following (in thousands):

	2016		2015			2014
Current:
U.S. Federal	$	7,432	$	19,544		$	20,822
State		748		4,469			4,838
Foreign		284		449			590
		8,464		24,462			26,250
Deferred:
U.S. Federal		6,521		1,183			489
State		140		(730	)		891
Foreign		36		89			99
		6,697		542			1,479
Total	$	15,161	$	25,004		$	27,729

Deferred Income Tax Assets and Liabilities

Deferred income tax assets and liabilities at December 31 consist of the following (in thousands):

	2016			2015
Domestic deferred tax assets:
Allowance for doubtful accounts	$	633		$	1,809
Other assets		2,792			4,434
Accrued expenses		5,384			4,868
Total domestic deferred tax assets	$	8,809		$	11,111
Domestic deferred tax liabilities:
Prepaid expenses	$	144		$	383
Marketable securities		1,613			1,060
Intangible assets		13,341			15,987
Property and equipment		41,530			34,177
Total domestic deferred tax liabilities	$	56,628		$	51,607
Net domestic deferred tax liabilities	$	47,819		$	40,496
Foreign deferred tax asset
Other assets	$	571		$	489
Valuation allowance - foreign		(407	)		(406	)
Total foreign deferred tax asset	$	164		$	83
Net deferred tax liability	$	47,655		$	40,413

Income Tax Expense Attributable to Income from Continuing Operations Differs from Statutory Rates

Income tax expense attributable to income from continuing operations differs from the statutory rates as follows:

	2016			2015			2014
Federal statutory rate		35	%		35	%		35	%
Non-deductible (benefit) expense		0	%		0	%		-2	%
State, net of federal benefit		2	%		4	%		5	%
Foreign		1	%		-1	%		0	%
Effective tax rate		38	%		38	%		38	%

Changes in Company's Gross Unrecognized Tax Benefits

The changes in our gross unrecognized tax benefits during the years ended December 31 are as follows (in thousands):

	2016			2015			2014
Unrecognized tax benefit – beginning of year	$	333		$	414		$	652
Increases related to prior year tax positions		24			42			4
Increases related to current year tax positions		95			6			13
Decreases related to prior year tax positions		(36	)		(129	)		(255	)
Unrecognized tax benefit – end of year	$	416		$	333		$	414

Leases (Tables)

12 Months Ended

Dec. 31, 2016

Leases [Abstract]

Schedule Of Future Minimum Rental Payments For Capital Leases And Operating Leases Table Text Block

Future minimum rental payments pursuant to leases that have an initial or remaining non-cancelable lease term in excess of one year as of December 31, 2016 are as follows (in thousands):

			Operating Leases
Years Ending December 31	Capital Leases		With Affiliates		With Third Parties		Total
2017	$	106	$	12,831	$	9,154	$	22,091
2018		95		9,032		5,143		14,270
2019		—		7,513		2,876		10,389
2020		—		5,520		2,162		7,682
2021		—		4,898		400		5,298
Thereafter		—		12,582		—		12,582
Total required payments		201	$	52,376	$	19,735	$	72,312
Less amounts representing interest (3.8% to 4.0%)		9
Present value of minimum lease payments		192
Less current maturities		100
	$	92

Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Components of Comprehensive Income

Comprehensive income includes the following for the years ended December 31 (in thousands):

	2016			2015			2014
Unrealized holding (losses) gains on available-for-sale securities arising during the period:
Gross amount	$	1,787		$	(1,597	)	$	620
Income tax (expense) benefit		(645	)		582			(208	)
Net of tax amount	$	1,142		$	(1,015	)	$	412
Realized (gains) on available-for-sale securities reclassified into income:
Realized gains on sales of available-for-sale securities	$	(412	)	$	(347	)	$	—
Other-than-temporary impairment losses		—			230			—
Total before tax		(412	)		(117	)		—
Income tax expense		148			45			—
Net of tax amount	$	(264	)	$	(72	)	$	—
Unrealized holding gains on interest rate swaps arising during the period:
Gross amount	$	161		$	—		$	—
Income tax expense		(62	)		—			—
Net of tax amount	$	99		$	—		$	—
Foreign currency translation adjustments	$	(1,161	)	$	(2,252	)	$	(1,631	)

Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Status of Nonvested Shares

A summary of the status of our non-vested shares as of December 31, 2016, and changes during the year ended December 31, 2016, is presented below:

	Shares			Weighted Average Grant Date Fair Value
Non-vested at January 1, 2016		68,225		$	17.80
Granted		10,000		$	15.55
Vested		(33,225	)	$	17.19
Forfeited		—		$	—
Balance at December 31, 2016		45,000		$	17.75

Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Data

	2016
	1^st quarter		2^nd quarter		3^rd quarter		4^th quarter
	(in thousands, except per share information)
Operating revenue	$	260,394	$	276,813	$	271,493	$	264,051
Operating income		13,930		16,774		10,027		5,849
Income before income taxes		12,105		14,771		8,119		4,410
Provision for income taxes		4,628		5,724		3,122		1,687
Net income	$	7,477	$	9,047	$	4,997	$	2,723
Earnings per common share:
Basic	$	0.26	$	0.32	$	0.18	$	0.10
Diluted	$	0.26	$	0.32	$	0.18	$	0.10
Weighted average number of common shares outstanding:
Basic		28,402		28,414		28,413		28,415
Diluted		28,402		28,414		28,413		28,415

	2015
	1^st quarter		2^nd quarter		3^rd quarter		4^th quarter
	(in thousands, except per share information)
Operating revenue	$	263,561	$	295,007	$	284,214	$	285,991
Operating income		15,067		22,920		16,944		18,464
Income before income taxes		13,332		21,584		15,001		15,088
Provision for income taxes		5,168		8,300		5,754		5,782
Net income	$	8,164	$	13,284	$	9,247	$	9,306
Earnings per common share:
Basic	$	0.27	$	0.44	$	0.32	$	0.33
Diluted	$	0.27	$	0.44	$	0.32	$	0.33
Weighted average number of common shares outstanding:
Basic		29,992		29,979		28,661		28,380
Diluted		29,998		29,980		28,661		28,382

Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Summary of Company's Reportable Segment Information

The following tables summarize information about our reportable segments as of and for the fiscal years ended December 31, 2016, 2015 and 2014 (in thousands):

2016	Transportation		Logistics		Other			Total
Operating revenues	$	656,496	$	414,948	$	1,307		$	1,072,751
Eliminated inter-segment revenues		1,896		7,482		—			9,378
Depreciation and amortization		13,459		23,064		179			36,702
Income from operations		22,399		27,653		(3,472	)		46,580
Capital expenditures		9,464		91,045		500			101,009
Total assets		252,164		292,227		26,066			570,457

2015	Transportation		Logistics		Other			Total
Operating revenues	$	721,437	$	406,822	$	514		$	1,128,773
Eliminated inter-segment revenues		3,659		6,170		—			9,829
Depreciation and amortization		11,153		23,565		155			34,873
Income from operations		28,683		43,848		864			73,395
Capital expenditures		2,034		23,797		426			26,257
Total assets		219,759		253,429		29,967			503,155

2014	Transportation		Logistics		Other			Total
Operating revenues	$	778,603	$	412,507	$	411		$	1,191,521
Eliminated inter-segment revenues		5,160		7,473		—			12,633
Depreciation and amortization		11,256		21,507		290			33,053
Income from operations		34,931		50,892		(4,988	)		80,835
Capital expenditures		16,444		42,413		927			59,784
Total assets		246,190		247,155		35,669			529,014

Revenues for Selected Services by Operating Segments

Revenues for selected services as provided to the chief operating decision maker are as follows (in thousands):

	Year Ended December 31,
	2016		2015		2014
Transportation services	$	629,192	$	696,134	$	769,308
Value-added services		302,225		285,258		284,496
Intermodal services		141,334		147,381		137,717
Total	$	1,072,751	$	1,128,773	$	1,191,521

Revenues Attributed to Geographic Areas

Revenues attributed to geographic areas are as follows (in thousands).

	Year Ended December 31,
	2016		2015		2014
United States	$	1,038,963	$	1,090,683	$	1,156,875
Mexico		20,046		27,676		24,860
Canada		12,157		8,577		9,786
Colombia		1,585		1,837		—
Total	$	1,072,751	$	1,128,773	$	1,191,521

Net Long-Lived Property and Equipment Assets by Geographic Areas

Net long-lived property and equipment assets are presented in the table below (in thousands):

	Year Ended December 31,
	2016		2015
United States	$	233,644	$	173,009
Mexico		12,188		3,674
Canada		431		500
Colombia		14		6
Total	$	246,277	$	177,189

Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($) Company Segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Accounting Policies [Line Items]
Proceeds from sale of marketable securities		$ 900,000	$ 400,000
Cost on sale of marketable securities		500,000	100,000
Realized gain on sale of marketable securities		400,000	300,000
Equity securities at book value		3,500,000
Temporary impairment loss of equity securities		$ 600,000
Number of investments in publicly traded companies \| Company		27
Depreciation expense		$ 29,200,000	25,800,000	$ 23,100,000
Weighted average amortization period		12 years
Amounts recorded for amortization expense		$ 7,500,000	9,200,000	9,900,000
Goodwill impairment loss recognized	$ 0
Goodwill		$ 74,484,000	74,484,000
Deferred compensation bonus annual installments		5 years
Fuel surcharges		$ 50,900,000	75,700,000	$ 119,700,000
Number of reportable segments \| Segment		2
Prepaid expenses and other		$ 17,374,000	17,858,000
Other noncurrent assets		4,892,000	3,894,000
Equity Securities, Gross unrealized holding gains		4,780,000	3,958,000
Equity Securities, Gross unrealized holding (losses)		(589,000)	(1,141,000)
Disclose of operating lease obligations		$ 72,100,000
Reclassification Adjustment [Member]
Accounting Policies [Line Items]
Prepaid expenses and other			300,000
Other noncurrent assets			$ 1,200,000
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Percentage of revenues from major customers		42.50%	37.30%	36.50%
General Motors [Member] \| Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Percentage of revenues from major customers		17.90%	11.40%	9.70%
Top Ten Customers [Member] \| Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Accounting Policies [Line Items]
Percentage of revenues from major customers		40.90%
Transportation [Member]
Accounting Policies [Line Items]
Goodwill		$ 18,200,000	$ 18,200,000
Logistics [Member]
Accounting Policies [Line Items]
Goodwill		$ 56,300,000	$ 56,300,000
Customer contracts [Member]
Accounting Policies [Line Items]
Weighted average amortization period		3 years
Agent and customer relationships [Member]
Accounting Policies [Line Items]
Weighted average amortization period		15 years
Minimum [Member]
Accounting Policies [Line Items]
Estimated useful lives		3 years
Maximum [Member]
Accounting Policies [Line Items]
Estimated useful lives		19 years

Summary of Significant Accounting Policies - Schedule of Cost, Gross Unrealized Holding Gains Losses, and Fair Value of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investments Debt And Equity Securities [Abstract]
Equity Securities, Cost	$ 10,168	$ 10,614
Equity Securities, Gross unrealized holding gains	4,780	3,958
Equity Securities, Gross unrealized holding (losses)	(589)	(1,141)
Equity Securities, Fair Value	$ 14,359	$ 13,431

Summary of Significant Accounting Policies - Schedule of Gross Unrealized Holding Losses and Fair Value of Marketable Securities (Detail) - Equity securities [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Equity securities, Less than 12 Months Fair Value	$ 426	$ 3,099
Equity securities, Less than 12 Months Unrealized Losses	41	987
Equity securities, 12 Months or Greater Fair Value	2,438	345
Equity securities, 12 Months or Greater Unrealized Losses	548	154
Equity securities, Total, Fair Value	2,864	3,444
Equity securities, Total, Unrealized Losses	$ 589	$ 1,141

Summary of Significant Accounting Policies - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Raw materials and supplies	$ 7,077	$ 7,660
Finished goods	1,540	962
Inventory, Net	$ 8,617	$ 8,622

Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Detail)	12 Months Ended
	Dec. 31, 2016
Minimum [Member] \| Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] \| Other operating assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] \| Information technology equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] \| Buildings and related assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Maximum [Member] \| Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Maximum [Member] \| Other operating assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	15 years
Maximum [Member] \| Information technology equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Maximum [Member] \| Buildings and related assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	39 years

Summary of Significant Accounting Policies - Schedule of Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Less: accumulated amortization	$ (50,971)	$ (43,495)
Intangible assets, net	34,689	42,165
Total Identifiable Intangible Assets	37,189	44,665
Agent and customer relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite lived intangible assets gross	65,060	65,060
Customer contracts [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite lived intangible assets gross	20,600	20,600
Trademarks [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets excluding goodwill	$ 2,500	$ 2,500

Summary of Significant Accounting Policies - Estimated Amortization Expense by Year (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
2017	$ 5,995
2018	2,517
2019	2,265
2020	1,970
2021	1,959
Thereafter	19,983
Intangible assets, net	$ 34,689	$ 42,165

Business Combinations - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2014
Business Acquisition [Line Items]
Weighted average amortization period		12 years
Bull's-Eye Express, Inc. [Member]
Business Acquisition [Line Items]
Cost of acquisition	$ 1.6
Business acquisition cost of acquired cash paid			$ 1.3
Business acquisition debt forgiveness			$ 0.3
Bull's-Eye Express, Inc. [Member] \| Customer relationships [Member]
Business Acquisition [Line Items]
Weighted average amortization period		7 years

Business Combinations - Schedule of Allocation of Purchase Price (Detail) - Bull's-Eye Express, Inc. [Member] $ in Thousands	Sep. 30, 2014 USD ($)
Business Acquisition [Line Items]
Intangible assets	$ 1,007
Property and equipment	400
Goodwill (tax deductible)	163
Total assets and liabilities acquired	$ 1,570

Accounts Receivable - Summary of Activity in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Balance at beginning of year	$ 5,173	$ 5,207	$ 2,688
Provision for doubtful accounts	3,099	3,004	3,504
Uncollectible accounts written off	(6,659)	(3,038)	(985)
Balance at end of year	$ 1,613	$ 5,173	$ 5,207

Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment	$ 427,571	$ 349,004
Less accumulated depreciation	(181,294)	(171,815)
Total	246,277	177,189
Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	214,046	185,351
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	96,549	73,096
Other operating assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	77,252	66,290
Information technology equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	19,520	18,660
Construction in process [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 20,204	$ 5,607

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Payroll related items	$ 8,379	$ 6,833
Driver escrow liabilities	7,601	4,486
Commissions, taxes and other	3,685	7,670
Total	$ 19,665	$ 18,989

Debt - Details of Debt (Detail) - USD ($)
$ in Thousands

Dec. 31, 2016

Dec. 31, 2015

Outstanding Debt:

Unamortized debt issuance costs

$ (1,583)

$ (1,499)

Outstanding Debt

261,267

233,414

Less current portion of long-term debt

34,455

61,224

Total long-term debt, net of current portion

226,812

172,190

ABL Facility [Member]

Outstanding Debt:

Outstanding Debt

^[1]

$ 71,600

59,569

ABL Facility [Member] | Minimum [Member]

Outstanding Debt:

Credit facility, Interest Rates

^[1]

2.27%

ABL Facility [Member] | Maximum [Member]

Outstanding Debt:

Credit facility, Interest Rates

^[1]

4.25%

Westport Facility Term Loan [Member]

Outstanding Debt:

Outstanding Debt

^[2]

$ 34,000

40,000

Credit facility, Interest Rates

^[2]

3.26%

Westport Facility Revolver [Member]

Outstanding Debt:

Outstanding Debt

^[2]

$ 3,000

11,766

Credit facility, Interest Rates

^[2]

2.76%

Equipment Financing [Member]

Outstanding Debt:

Outstanding Debt

^[3]

$ 104,607

83,578

Equipment Financing [Member] | Minimum [Member]

Outstanding Debt:

Credit facility, Interest Rates

^[3]

3.18%

Equipment Financing [Member] | Maximum [Member]

Outstanding Debt:

Credit facility, Interest Rates

^[3]

4.11%

Real Estate Financing [Member]

Outstanding Debt:

Outstanding Debt

^[4]

$ 49,643

Credit facility, Interest Rates

^[4]

3.00%

Margin Facility [Member]

Outstanding Debt:

Credit facility, Interest Rates

^[5]

1.86%

Unsecured Loan [Member]

Outstanding Debt:

Outstanding Debt

$ 40,000

[1]	The ABL Facility provides for maximum borrowings of $120 million at a variable rate of interest based on LIBOR or a base rate, and matures on December 23, 2020. The facility, which is secured by cash, deposits and accounts receivable of the borrowing subsidiaries, includes customary affirmative and negative covenants and events of default, as well as financial covenants requiring a minimum fixed charge coverage ratio to be maintained after a triggering event. Interest on base rate advances is payable quarterly, and interest on each LIBOR-based advance is payable on the last day of the applicable interest period. At December 31, 2016, we were in compliance with all covenants under the Facility, and $22.9 million was available for borrowing.
[2]	The Westport Facility provides our subsidiary, Westport Axle Corporation, with maximum borrowings of $60 million in the form of a $40 million term loan and a $20 million revolver. Borrowings under the Westport Facility, which matures on December 23, 2020, accrue interest at a variable interest rate based on LIBOR or a base rate, and are secured by all of Westport’s assets. The Company becomes a guarantor upon the occurrence of certain events specified in the Westport Facility. Borrowings are repaid in part quarterly with the balance due at maturity. Interest on base rate advances is payable quarterly, and interest on each LIBOR-based advance is payable on the last day of the applicable interest period. The Westport Facility includes customary affirmative and negative covenants and events of default. At December 31, 2016, we were in compliance with all covenants, and $7.4 million was available for borrowing.
[3]	The Equipment Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance transportation equipment. The equipment notes, which are secured by liens on selected titled vehicles, include certain affirmative and negative covenants, are generally payable in 60 monthly installments and bear interest at fixed rates ranging from 3.18% to 4.11%. At December 31, 2016, we were in compliance with all covenants.
[4]	The Real Estate Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance certain purchases of real property and refinance a portion of existing indebtedness pursuant to a $40 million unsecured loan. The promissory notes require monthly payments of principal and accrued interest until their maturity on June 30, 2026. The notes are secured by first mortgages and assignment of leases on specific parcels of real estate and improvements included in a collateral pool specified in the security documents. The Real Estate Financing includes an additional promissory note that is secured by other real property and improvements and matures on September 5, 2026. Each of the notes bears interest at LIBOR plus 2.25%. At December 31, 2016, we were in compliance with all covenants.
[5]	The Margin Facility is a short-term line of credit secured by our portfolio of marketable securities. It bears interest at LIBOR plus 1.10%. The amount available under the line of credit is based on a percentage of the market value of the underlying securities. We did not have any amounts outstanding under our line of credit at December 31, 2016 or 2015, and the maximum available borrowings under the line of credit were $7.0 million and $7.4 million, respectively.

Debt - Details of Debt (Parenthetical) (Detail)

12 Months Ended

Dec. 31, 2016

USD ($)

Installment

Dec. 31, 2015

USD ($)

Debt Instrument [Line Items]

Credit facility, borrowing capacity

$ 60,000,000

Description of variable rate basis

LIBOR rate plus 2.25%

ABL Facility [Member]

Debt Instrument [Line Items]

Credit facility, borrowing capacity

$ 120,000,000

Credit facility, expiration date

Dec. 23, 2020

Credit facility available for borrowings

$ 22,900,000

Westport Facility Term Loan [Member]

Debt Instrument [Line Items]

Credit facility, borrowing capacity

40,000,000

Westport Facility Revolver [Member]

Debt Instrument [Line Items]

Credit facility, borrowing capacity

$ 20,000,000

Westport Facility

Debt Instrument [Line Items]

Credit facility, expiration date

Dec. 23, 2020

Credit facility available for borrowings

$ 7,400,000

Equipment Financing [Member]

Debt Instrument [Line Items]

Number of installments | Installment

Frequency of installments

monthly

Equipment Financing [Member] | Minimum [Member]

Debt Instrument [Line Items]

Credit facility, Interest Rates

^[1]

3.18%

Equipment Financing [Member] | Maximum [Member]

Debt Instrument [Line Items]

Credit facility, Interest Rates

^[1]

4.11%

Real Estate Financing [Member] | Unsecured Loan [Member]

Debt Instrument [Line Items]

Debt instrument, face amount

$ 40,000,000

Frequency of installments

Monthly

Principal amount due date

Jun. 30, 2026

Real Estate Financing [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Principal amount due date

Sep. 05, 2026

Description of variable rate basis

LIBOR plus 2.25%

Real Estate Financing [Member] | Secured Debt [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Interest rate above variable base rate

2.25%

Margin Facility [Member]

Debt Instrument [Line Items]

Credit facility available for borrowings

$ 7,000,000

$ 7,400,000

Description of variable rate basis

LIBOR plus 1.10%

Margin Facility [Member] | LIBOR [Member]

Debt Instrument [Line Items]

Interest rate above variable base rate

1.10%

[1]

The Equipment Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance transportation equipment. The equipment notes, which are secured by liens on selected titled vehicles, include certain affirmative and negative covenants, are generally payable in 60 monthly installments and bear interest at fixed rates ranging from 3.18% to 4.11%. At December 31, 2016, we were in compliance with all covenants.

Debt - Summary of Maturities of Principal Repayment Obligations (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Debt Maturities [Line Items]
2017	$ 34,701
2018	35,616
2019	36,488
2020	121,993
2021	10,200
Thereafter	23,852
Total	262,850
ABL Facility [Member]
Debt Maturities [Line Items]
2020	71,600
Total	71,600
Westport Facility Term Loan [Member]
Debt Maturities [Line Items]
2017	6,000
2018	6,000
2019	6,000
2020	16,000
Total	34,000
Westport Facility Revolver [Member]
Debt Maturities [Line Items]
2020	3,000
Total	3,000
Equipment Financing [Member]
Debt Maturities [Line Items]
2017	23,525
2018	24,440
2019	25,312
2020	26,217
2021	5,025
Thereafter	88
Total	104,607
Real Estate Financing [Member]
Debt Maturities [Line Items]
2017	5,176
2018	5,176
2019	5,176
2020	5,176
2021	5,175
Thereafter	23,764
Total	$ 49,643

Debt - Additional Information (Detail)	12 Months Ended
Debt - Additional Information (Detail)	Dec. 31, 2016 USD ($) Agreement
Line of Credit Facility [Line Items]
Number of swap agreements \| Agreement	3
Notional amount	$ 27,700,000
Description of variable rate basis	LIBOR rate plus 2.25%
Swap A [Member]
Line of Credit Facility [Line Items]
Notional amount	$ 10,000,000
Interest accrued percentage	4.16%
Effective date	Oct. 31, 2016
Swap B [Member]
Line of Credit Facility [Line Items]
Notional amount	$ 5,700,000
Interest accrued percentage	3.83%
Effective date	Oct. 31, 2016
Interest Rate Swap C
Line of Credit Facility [Line Items]
Notional amount	$ 12,000,000
Description of variable rate basis	one-month LIBOR rate
Swap interest rate	0.78%
Fair value asset of swap agreement	$ 200,000

Fair Value Measurement and Disclosures - Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 14,359	$ 13,431
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	4	96
Marketable securities	14,359	13,431
Interest rate swaps	161
Total Assets	14,524	13,527
Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	4	96
Marketable securities	14,359	13,431
Total Assets	14,363	$ 13,527
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	161
Total Assets	$ 161

Fair Value Measurement and Disclosures - Summary of Carrying Values and Estimated Fair Values of Promissory Notes (Detail) - Equipment Promissory Notes [Member]	Dec. 31, 2016 USD ($)
Carrying Reported Amount Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 104,607
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 104,433

Transactions with Affiliates - Schedule of Amounts Charged to UTSI (Detail) - Affiliates [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	$ 67,249	$ 66,073	$ 51,254
Administrative support services [Member]
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	2,638	3,234	2,459
Truck fuel, tolls and maintenance [Member]
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	2,656	2,523	1,320
Real estate rent and related costs [Member]
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	17,174	13,174	10,472
Insurance and employee benefit plans [Member]
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	44,548	46,173	36,073
Contracted transportation services [Member]
Related Party Transaction [Line Items]
Cost incurred for services provided by CenTra and affiliates	$ 233	$ 969	$ 930

Transactions with Affiliates - Additional Information (Detail)			12 Months Ended
	Aug. 08, 2016 USD ($)	Aug. 04, 2016 USD ($) shares	Dec. 31, 2016 USD ($) Facility	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
Occupancy of facilities either on monthly or contractual basis \| Facility			36
Insurance, claims and other receivables			$ 8,700,000	$ 11,500,000
Due to affiliates			4,597,000	3,413,000
Amounts paid for legal services			0	1,500	$ 92,000
Due from affiliates			2,513,000	1,924,000
Affiliates [Member]
Related Party Transaction [Line Items]
Cost of real property improvements			1,000,000
Affiliates [Member] \| Snow Removal Equipment [Member]
Related Party Transaction [Line Items]
Cost of purchase from an affiliate				$ 18,000
Affiliates [Member] \| Wheels and Tires [Member]
Related Party Transaction [Line Items]
Cost of purchase from an affiliate			2,300,000
Affiliates [Member] \| Revenue Equipment [Member]
Related Party Transaction [Line Items]
Cost of purchase from an affiliate			$ 200,000
Chief Financial Officer [Member] \| Restricted Stock [Member]
Related Party Transaction [Line Items]
Shares acquisition by exercise right of first refusal , Shares \| shares		1,600
Shares acquisition by exercise right of first refusal , Value		$ 23,856
Crown Enterprises, Inc [Member]
Related Party Transaction [Line Items]
Cost of acquisition	$ 22,500,000

Transactions with Affiliates - Schedule of Services Provided to Affiliates (Detail) - Affiliates [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Services provided to affiliates	$ 1,090	$ 400	$ 466
Purchased Transportation And Equipment Rent [Member]
Related Party Transaction [Line Items]
Services provided to affiliates	$ 1,090	$ 400	308
Fueling, Maintenance And Other Support Services [Member]
Related Party Transaction [Line Items]
Services provided to affiliates			$ 158

Income Taxes - Summary of Income (Loss) Related to U.S. and Non-U.S. Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (Loss) Before Income Taxes [Line Items]
Income (loss) before provision for income taxes	$ 39,405	$ 65,005	$ 73,099
U.S. Domestic [Member]
Income (Loss) Before Income Taxes [Line Items]
Income (loss) before provision for income taxes	40,172	62,781	70,079
Foreign [Member]
Income (Loss) Before Income Taxes [Line Items]
Income (loss) before provision for income taxes	$ (767)	$ 2,224	$ 3,020

Income Taxes - Provision for Income Taxes Attributable to Income from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
U.S. Federal									$ 7,432	$ 19,544	$ 20,822
State									748	4,469	4,838
Foreign									284	449	590
Current income taxes provision, Total									8,464	24,462	26,250
Deferred:
U.S. Federal									6,521	1,183	489
State									140	(730)	891
Foreign									36	89	99
Deferred income taxes provision, Total									6,697	542	1,479
Total	$ 1,687	$ 3,122	$ 5,724	$ 4,628	$ 5,782	$ 5,754	$ 8,300	$ 5,168	$ 15,161	$ 25,004	$ 27,729

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Noncurrent deferred income tax liabilities	$ 47,819	$ 40,496
Noncurrent deferred assets	164	83
Undistributed earnings of foreign subsidiaries	8,700
Unrecognized tax benefit in certain tax positions	416	333	$ 414	$ 652
Accrued interest	100
Accrued penalties	$ 100
ASU 2015-17 [Member]
Income Taxes [Line Items]
Noncurrent deferred income tax liabilities		6,300
Noncurrent deferred assets		$ 100

Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Domestic deferred tax liabilities:
Net deferred tax liability	$ 47,655	$ 40,413
Domestic [Member]
Deferred tax assets:
Allowance for doubtful accounts	633	1,809
Other assets	2,792	4,434
Accrued expenses	5,384	4,868
Deferred tax assets	8,809	11,111
Domestic deferred tax liabilities:
Prepaid expenses	144	383
Marketable securities	1,613	1,060
Intangible assets	13,341	15,987
Property and equipment	41,530	34,177
Deferred tax liabilities	56,628	51,607
Net deferred tax liability	47,819	40,496
Foreign [Member]
Deferred tax assets:
Other assets	571	489
Valuation allowance-foreign	(407)	(406)
Deferred tax assets	$ 164	$ 83

Income Taxes - Income Tax Expense Attributable to Income from Continuing Operations Differs from Statutory Rates (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
Non-deductible (benefit) expense	(0.00%)	(0.00%)	(2.00%)
State, net of federal benefit	2.00%	4.00%	5.00%
Foreign	1.00%	(1.00%)	0.00%
Effective tax rate	38.00%	38.00%	38.00%

Income Taxes - Changes in Company's Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Unrecognized tax benefit - beginning of year	$ 333	$ 414	$ 652
Increases related to prior year tax positions	24	42	4
Increases related to current year tax positions	95	6	13
Decreases related to prior year tax positions	(36)	(129)	(255)
Unrecognized tax benefit - end of year	$ 416	$ 333	$ 414

Leases - Schedule of Future Minimum Rental Payments Under Non-Cancelable Capital Leases and Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Operating Leases Future Minimum Payments Due [Line Items]
2017	$ 106
2018	95
2019	0
2020	0
2021	0
Thereafter	0
Total required payments, capital lease	201
Less amounts representing interest (3.8% to 4.0%)	9
Present value of minimum lease payments	192
Less current maturities	100	$ 916
Capital leases future minimum rental payment, Total	92	$ 1,065
Total required payments	72,100
2017	22,091
2018	14,270
2019	10,389
2020	7,682
2021	5,298
Thereafter	12,582
Total required payments	72,312
Operating Leases with Affiliates [Member]
Operating Leases Future Minimum Payments Due [Line Items]
2017	12,831
2018	9,032
2019	7,513
2020	5,520
2021	4,898
Thereafter	12,582
Total required payments	52,376
Operating Leases With Third Parties [Member]
Operating Leases Future Minimum Payments Due [Line Items]
2017	9,154
2018	5,143
2019	2,876
2020	2,162
2021	400
Thereafter	0
Total required payments	$ 19,735

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Lease Disclosure [Line Items]
Rental expense for facilities, vehicles and other equipment leased from third parties	$ 20.2	$ 19.2	$ 21.9
Property, Plant and Equipment [Member]
Lease Disclosure [Line Items]
Assets under capital leases	0.5	5.4
Amortization expense capital leased assets	0.3	1.5
Amortization expense capital leased assets	$ 0.1	$ 0.9	$ 0.8

Comprehensive Income - Components of Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Unrealized holding (losses) gains on available-for-sale securities, Gross amount	$ 1,787	$ (1,597)	$ 620
Unrealized holding gains (losses) on available-for-sale securities, Income tax (expense) benefit	(645)	582	(208)
Unrealized holding (losses) gains on available-for-sale investments, Net of tax amount	1,142	(1,015)	412
Realized (gains) on sales of available-for-sale securities	(412)	(347)
Realized (gains) on available-for-sale securities reclassified into income, Other-than-temporary impairment losses		230
Realized (gains) on available-for-sale securities reclassified into income, Total before tax	(412)	(117)
Realized (gains) on available-for-sale securities reclassified into income, Income tax expense	148	45
Realized (gains) on available-for-sale securities reclassified into income, Net of tax amount	(264)	(72)
Unrealized holding gains on interest rate swaps, Gross amount	161
Unrealized holding gains on interest rate swaps, Income tax expense	(62)
Unrealized holding gains on interest rate swaps, Net of tax amount	99
Foreign currency translation adjustments	$ (1,161)	$ (2,252)	$ (1,631)

Retirement Plans - Additional Information (Detail)	12 Months Ended
Retirement Plans - Additional Information (Detail)	Dec. 31, 2016 USD ($) Employee	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2008 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension plan contribution				$ 600
Expense of retirement plans	$ 500,000	$ 200,000	$ 400,000
Canadian [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of employees covered \| Employee	12
Required contributions into Canada Wide Industrial Pension Plan	$ 31,000	$ 38,000
Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Matching contributions offered to employee	0
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Matching contributions offered to employee	$ 2,080

Stock Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions						12 Months Ended
	Feb. 24, 2016	Dec. 23, 2015	Apr. 29, 2015	Mar. 05, 2015	Dec. 20, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock grants vested		25.00%			25.00%
Total fair value of shares vested						$ 0.6	$ 0.5	$ 1.5
Total unrecognized compensation cost						0.8
Share based compensation cost is expected to be recognized on a straight-line basis in fiscal 2017						0.4
Share based compensation cost is expected to be recognized on a straight-line basis in fiscal 2018						0.3
Share based compensation cost is expected to be recognized on a straight-line basis in fiscal 2019						$ 0.1
Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock grants vested	25.00%		25.00%	25.00%
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted stock granted		50,000			178,137	10,000
Restricted stock grant date fair value per share		$ 14.93			$ 16.42	$ 15.55
Restricted Stock [Member] \| Chief Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of restricted stock granted	10,000	5,000	20,000	10,000
Restricted stock grant date fair value per share	$ 15.55		$ 22.03	$ 25.18
Equal Installments with the Final Vesting on March 5, 2019 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional restricted stock grants vested per year						25.00%
Equal Increments on Each December 20 in 2016, 2017 and 2018 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional restricted stock grants vested per year						25.00%
Grants Vesting on December 20, 2016 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional restricted stock grants vested per year						20.00%

Stock Based Compensation - Summary of Status of Nonvested Shares (Detail) - Restricted Stock [Member] - $ / shares			12 Months Ended
	Dec. 23, 2015	Dec. 20, 2012	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares Nonvested, Beginning Balance			68,225
Shares, Granted	50,000	178,137	10,000
Shares, Vested			(33,225)
Shares, Ending Balance			45,000
Weighted Average Grant Date Fair Value, Beginning Balance			$ 17.80
Weighted Average Grant Date Fair Value, Granted	$ 14.93	$ 16.42	15.55
Weighted Average Grant Date Fair Value, Vested			17.19
Weighted Average Grant Date Fair Value, Ending Balance			$ 17.75

Commitments and Contingencies - Additional Information (Detail) - Workforce Subject to Collective Bargaining Arrangements [Member] - Unionized Employees Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2016
Concentration Risk [Line Items]
Percentage of employees agreements that expire in 2017	18.00%
United States, Canada and Colombia [Member]
Concentration Risk [Line Items]
Percentage of revenues from major customers	31.00%
Mexico [Member]
Concentration Risk [Line Items]
Percentage of revenues from major customers	94.00%

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Weighted average non-vested shares of restricted shares	0	2,273	31,230
Antidilutive securities excluded from computation of earnings per share, amount	45,000	30,725	0

Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Operating revenue	$ 264,051	$ 271,493	$ 276,813	$ 260,394	$ 285,991	$ 284,214	$ 295,007	$ 263,561	$ 1,072,751	$ 1,128,773	$ 1,191,521
Operating income	5,849	10,027	16,774	13,930	18,464	16,944	22,920	15,067	46,580	73,395	80,835
Income before income taxes	4,410	8,119	14,771	12,105	15,088	15,001	21,584	13,332
Provision for income taxes	1,687	3,122	5,724	4,628	5,782	5,754	8,300	5,168	15,161	25,004	27,729
Net income	$ 2,723	$ 4,997	$ 9,047	$ 7,477	$ 9,306	$ 9,247	$ 13,284	$ 8,164	$ 24,244	$ 40,001	$ 45,370
Earnings per common share:
Basic	$ 0.10	$ 0.18	$ 0.32	$ 0.26	$ 0.33	$ 0.32	$ 0.44	$ 0.27	$ 0.85	$ 1.37	$ 1.51
Diluted	$ 0.10	$ 0.18	$ 0.32	$ 0.26	$ 0.33	$ 0.32	$ 0.44	$ 0.27	$ 0.85	$ 1.37	$ 1.51
Weighted average number of common shares outstanding:
Basic	28,415	28,413	28,414	28,402	28,380	28,661	29,979	29,992	28,411	29,233	30,013
Diluted	28,415	28,413	28,414	28,402	28,382	28,661	29,980	29,998	28,411	29,235	30,044

Segment Reporting - Summary of Company's Reportable Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 264,051	$ 271,493	$ 276,813	$ 260,394	$ 285,991	$ 284,214	$ 295,007	$ 263,561	$ 1,072,751	$ 1,128,773	$ 1,191,521
Depreciation and amortization									36,702	34,873	33,053
Income from operations	5,849	$ 10,027	$ 16,774	$ 13,930	18,464	$ 16,944	$ 22,920	$ 15,067	46,580	73,395	80,835
Capital expenditures									101,009	26,257	59,784
Total assets	570,457				503,155				570,457	503,155	529,014
Operating Segments [Member] \| Transportation [Member]
Segment Reporting Information [Line Items]
Revenues									656,496	721,437	778,603
Depreciation and amortization									13,459	11,153	11,256
Income from operations									22,399	28,683	34,931
Capital expenditures									9,464	2,034	16,444
Total assets	252,164				219,759				252,164	219,759	246,190
Operating Segments [Member] \| Logistics [Member]
Segment Reporting Information [Line Items]
Revenues									414,948	406,822	412,507
Depreciation and amortization									23,064	23,565	21,507
Income from operations									27,653	43,848	50,892
Capital expenditures									91,045	23,797	42,413
Total assets	292,227				253,429				292,227	253,429	247,155
Other [Member]
Segment Reporting Information [Line Items]
Revenues									1,307	514	411
Depreciation and amortization									179	155	290
Income from operations									(3,472)	864	(4,988)
Capital expenditures									500	426	927
Total assets	$ 26,066				$ 29,967				26,066	29,967	35,669
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues									9,378	9,829	12,633
Intersegment Eliminations [Member] \| Transportation [Member]
Segment Reporting Information [Line Items]
Revenues									1,896	3,659	5,160
Intersegment Eliminations [Member] \| Logistics [Member]
Segment Reporting Information [Line Items]
Revenues									$ 7,482	$ 6,170	$ 7,473

Segment Reporting - Revenues for Selected Services by Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Transportation services									$ 629,192	$ 696,134	$ 769,308
Value-added services									302,225	285,258	284,496
Intermodal services									141,334	147,381	137,717
Total operating revenues	$ 264,051	$ 271,493	$ 276,813	$ 260,394	$ 285,991	$ 284,214	$ 295,007	$ 263,561	$ 1,072,751	$ 1,128,773	$ 1,191,521

Segment Reporting - Revenues Attributed to Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 264,051	$ 271,493	$ 276,813	$ 260,394	$ 285,991	$ 284,214	$ 295,007	$ 263,561	$ 1,072,751	$ 1,128,773	$ 1,191,521
United States [Member]
Segment Reporting Information [Line Items]
Revenues									1,038,963	1,090,683	1,156,875
Mexico [Member]
Segment Reporting Information [Line Items]
Revenues									20,046	27,676	24,860
Canada [Member]
Segment Reporting Information [Line Items]
Revenues									12,157	8,577	$ 9,786
Colombia [Member]
Segment Reporting Information [Line Items]
Revenues									$ 1,585	$ 1,837

Segment Reporting - Net Long-Lived Property and Equipment Assets by Geographic Areas (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Property and equipment, total	$ 246,277	$ 177,189
United States [Member]
Segment Reporting Information [Line Items]
Property and equipment, total	233,644	173,009
Mexico [Member]
Segment Reporting Information [Line Items]
Property and equipment, total	12,188	3,674
Canada [Member]
Segment Reporting Information [Line Items]
Property and equipment, total	431	500
Colombia [Member]
Segment Reporting Information [Line Items]
Property and equipment, total	$ 14	$ 6

Subsequent Events - Additional Information (Detail) - $ / shares		12 Months Ended
	Feb. 23, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Quarterly cash dividend declared per common stock		$ 0.28	$ 0.28	$ 0.28
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends payable, date declared	Feb. 23, 2017
Quarterly cash dividend declared per common stock	$ 0.07
Dividends payable, recorded date	Mar. 06, 2017
Dividends payable, date to be paid	Mar. 16, 2017

Segment Reporting - Additional Information (Detail)	12 Months Ended
Segment Reporting - Additional Information (Detail)	Dec. 31, 2016 Segment
Segment Reporting [Abstract]
Number of reportable segments	2