Hub (HUBG) 10-K 27 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Feb. 18, 2015
Document Information [Line Items]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	HUBG
Entity Registrant Name	HUB GROUP INC
Entity Central Index Key	940942
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$1,778,865,682
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding			36,204,899
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding			662,296

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS:
Cash and cash equivalents	$109,769	$68,964
Accounts receivable trade, net	401,803	371,528
Accounts receivable other	24,886	26,569
Prepaid taxes	14,937	409
Deferred taxes	4,816	5,826
Prepaid expenses and other current assets	14,355	12,738
TOTAL CURRENT ASSETS	570,566	486,034
Restricted investments	21,944	20,754
Property and equipment, net	338,327	260,400
Other intangibles, net	14,434	15,729
Goodwill, net	262,813	263,032
Other assets	4,043	1,994
TOTAL ASSETS	1,212,127	1,047,943
CURRENT LIABILITIES:
Accounts payable trade	256,345	232,350
Accounts payable other	21,333	24,957
Accrued payroll	16,192	17,000
Accrued other	43,523	42,834
Current portion of capital lease	2,504	2,413
Current portion of long term debt	19,619	1,771
TOTAL CURRENT LIABILITIES	359,516	321,325
Long term debt	72,460	6,475
Non-current liabilities	22,929	22,304
Long term portion of capital lease	15,937	18,477
Deferred taxes	140,501	117,835
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2014 and 2013
Additional paid-in capital	171,235	167,357
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	-15,458	-15,458
Retained earnings	589,809	538,251
Accumulated other comprehensive loss	-77	-85
Treasury stock; at cost, 4,977,468 shares in 2014 and 4,598,408 shares in 2013	-145,144	-128,957
TOTAL STOCKHOLDERS' EQUITY	600,784	561,527
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,212,127	1,047,943
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	412	412
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$7	$7

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Purchase price in excess of predecessor basis, tax benefit	$10,306
Treasury stock, shares	4,977,468	4,598,408
Class A Common Stock [Member]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	97,337,700	97,337,700
Common stock, shares issued	41,224,792	41,224,792
Common stock, shares outstanding	36,247,324	36,626,384
Class B Common Stock [Member]
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	662,300	662,300
Common stock, shares issued	662,296	662,296
Common stock, shares outstanding	662,296	662,296

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenue	$3,571,126	$3,373,898	$3,124,108
Transportation costs	3,200,691	3,002,875	2,768,042
Gross margin	370,435	371,023	356,066
Costs and expenses:
Salaries and benefits	136,480	135,341	129,143
Agent fees and commissions	62,041	55,789	55,112
General and administrative	58,014	56,772	52,832
Depreciation and amortization	7,799	6,470	6,619
Driver settlements and related costs	10,343
Impairment of software	11,881
Impairment of trade name		2,904
Total costs and expenses	286,558	257,276	243,706
Operating income	83,877	113,747	112,360
Other income (expense):
Interest expense	-1,785	-1,246	-1,207
Interest and dividend income	32	82	134
Other, net	-257	-28	-30
Total other expense	-2,010	-1,192	-1,103
Income before provision for income taxes	81,867	112,555	111,257
Provision for income taxes	30,309	43,445	43,304
Net income	51,558	69,110	67,953
Other comprehensive income (loss):
Foreign currency translation adjustments	8	-86	-3
Total comprehensive income	$51,566	$69,024	$67,950
Basic earnings per common share	$1.41	$1.88	$1.83
Diluted earnings per common share	$1.40	$1.87	$1.83
Basic weighted average number of shares outstanding	36,590	36,829	37,053
Diluted weighted average number of shares outstanding	36,732	36,982	37,185

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $)	Total	Class A and B Common Stock [Member]	Additional Paid-in Capital [Member]	Purchase Price Of Excess Of Predecessor Basis, Net Of Tax [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
In Thousands, except Share data
Beginning Balance at Dec. 31, 2011	$438,865	$419	$168,800	($15,458)	$401,188	$4	($116,088)
Beginning Balance (in shares) at Dec. 31, 2011		41,887,088					-4,364,532
Purchase of treasury shares	-11,208						-11,208
Purchase of treasury shares (in shares)							-347,592
Stock tendered for payments of withholding taxes	-1,812						-1,812
Stock tendered for payments of withholding taxes (in shares)							-55,463
Issuance of restricted stock awards, net of forfeitures			-7,148				7,148
Issuance of restricted stock awards, net of forfeitures (in shares)							273,180
Share-based compensation expense	6,539		6,539
Exercise of non-qualified options	69		-920				989
Exercise of non-qualified options (in shares)							37,100
Tax benefit of share-based compensation plans	494		494
Net income	67,953				67,953
Foreign currency translation adjustment	-3					-3
Ending Balance at Dec. 31, 2012	500,897	419	167,765	-15,458	469,141	1	-120,971
Ending Balance (in shares) at Dec. 31, 2012		41,887,088					-4,457,307
Purchase of treasury shares	-13,791						-13,791
Purchase of treasury shares (in shares)							-377,906
Stock tendered for payments of withholding taxes	-2,634						-2,634
Stock tendered for payments of withholding taxes (in shares)							-75,995
Issuance of restricted stock awards, net of forfeitures			-7,990				7,990
Issuance of restricted stock awards, net of forfeitures (in shares)							296,300
Share-based compensation expense	7,667		7,667
Exercise of non-qualified options	41		-408				449
Exercise of non-qualified options (in shares)							16,500
Tax benefit of share-based compensation plans	323		323
Net income	69,110				69,110
Foreign currency translation adjustment	-86					-86
Ending Balance at Dec. 31, 2013	561,527	419	167,357	-15,458	538,251	-85	-128,957
Ending Balance (in shares) at Dec. 31, 2013		41,887,088					-4,598,408
Purchase of treasury shares	-18,024						-18,024
Purchase of treasury shares (in shares)	-501,271						-501,271
Stock tendered for payments of withholding taxes	-3,195						-3,195
Stock tendered for payments of withholding taxes (in shares)							-80,772
Issuance of restricted stock awards, net of forfeitures			-5,032				5,032
Issuance of restricted stock awards, net of forfeitures (in shares)							202,983
Share-based compensation expense	8,258		8,258
Tax benefit of share-based compensation plans	652		652
Net income	51,558				51,558
Foreign currency translation adjustment	8					8
Ending Balance at Dec. 31, 2014	$600,784	$419	$171,235	($15,458)	$589,809	($77)	($145,144)
Ending Balance (in shares) at Dec. 31, 2014		41,887,088					-4,977,468

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$51,558	$69,110	$67,953
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,380	21,302	21,575
Impairment of software	11,881
Impairment of trade name		2,904
Deferred taxes	24,501	16,438	8,786
Compensation expense related to share-based compensation plans	8,258	7,667	6,539
(Gain) loss on sale of assets	-46	-167	108
Excess tax benefits from share based compensation		-13	-29
Changes in operating assets and liabilities:
Restricted investments	-1,190	-3,536	-2,895
Accounts receivable, net	-28,621	-25,420	-22,429
Prepaid taxes	-14,533	-308	2,253
Prepaid expenses and other current assets	-1,621	-2,137	-1,562
Other assets	-2,047	-682	459
Accounts payable	20,370	27,635	7,438
Accrued expenses	367	1,736	2,779
Non-current liabilities	284	2,888	1,942
Net cash provided by operating activities	98,541	117,417	92,917
Cash flows from investing activities:
Proceeds from sale of equipment	612	1,837	1,071
Purchases of property and equipment	-119,171	-110,917	-56,882
Cash used in acquisitions, net of cash acquired			-550
Net cash used in investing activities	-118,559	-109,080	-56,361
Cash flows from financing activities:
Proceeds from issuance of debt	91,084	9,120
Repayments of long term debt	-7,251	-874
Proceeds from stock options exercised	0	41	69
Stock tendered for payments of withholding taxes	-3,195	-2,634	-1,812
Purchase of treasury stock	-18,024	-13,791	-11,208
Capital lease payments	-2,449	-2,329	-2,454
Excess tax benefits from share-based compensation	652	336	523
Net cash provided by (used in) financing activities	60,817	-10,131	-14,882
Effect of exchange rate changes on cash and cash equivalents	6	-2	-5
Net increase (decrease) in cash and cash equivalents	40,805	-1,796	21,669
Cash and cash equivalents beginning of the year	68,964	70,760	49,091
Cash and cash equivalents end of the year	109,769	68,964	70,760
Supplemental disclosures of cash paid for:
Interest	1,532	1,201	1,200
Income taxes	$20,189	$29,728	$28,638

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	NOTE 1. Description of Business and Summary of Significant Accounting Policies
	Business: Hub Group, Inc. (“we”, “us” or “our”) provides intermodal transportation services utilizing primarily third party arrangements with railroads. Drayage can be provided by our subsidiary, Hub Group Trucking, Inc., or a third party company. We also arrange for transportation of freight by truck and perform logistics services. Transportation services are provided through our legacy business and our acquisition, Mode Transportation, LLC. We report two distinct business segments. The first segment is Mode, which includes the Mode business we acquired on April 1, 2011. The other segment is Hub, which is all business other than Mode. “Hub Group” includes both segments.
	Principles of Consolidation: The consolidated financial statements include our accounts and all entities in which we have more than a 50% equity ownership or otherwise exercise unilateral control. All significant intercompany balances and transactions have been eliminated.
	Cash and Cash Equivalents: We consider as cash equivalents all highly liquid instruments with an original maturity of three months or less. As of December 31, 2014 and 2013, our cash and temporary investments were with high quality financial institutions in DDAs (Demand Deposit Accounts).
	Accounts Receivable and Allowance for Uncollectible Accounts: In the normal course of business, we extend credit to customers after a review of each customer’s credit history. An allowance for uncollectible trade accounts has been established through an analysis of the accounts receivable aging, an assessment of collectability based on historical trends and an evaluation based on current economic conditions. To be more specific, we reserve a portion of every account balance that has aged over one year, a portion of receivables for customers in bankruptcy and certain account balances specifically identified as uncollectible. On an annual basis, we perform a hindsight analysis on Hub and Mode separately to determine each segment’s experience in collecting account balances over one year old and account balances in bankruptcy. We then use this hindsight analysis to establish our reserves for receivables over one year and in bankruptcy. In establishing a reserve for certain account balances specifically identified as uncollectible, we consider the aging of the customer receivables, the specific details as to why the receivable has not been paid, the customer’s current and projected financial results, the customer’s ability to meet and sustain their financial commitments, the positive or negative effects of the current and projected industry outlook and the general economic conditions. The allowance for uncollectible accounts is reported on the balance sheet in net accounts receivable. Our reserve for uncollectible accounts was approximately $7.0 million and $7.4 million as of December 31, 2014 and 2013, respectively. Receivables are written off once collection efforts have been exhausted. Recoveries of receivables previously charged off are recorded when received.
	Property and Equipment: Property and equipment are stated at cost. Depreciation of property and equipment is computed using the straight-line method at rates adequate to depreciate the cost of the applicable assets over their expected useful lives: building and improvements, up to 40 years; leasehold improvements, the shorter of useful life or lease term; computer equipment and software, up to 5 years; furniture and equipment, up to 10 years; and transportation equipment up to 15 years. Direct costs related to internally developed software projects are capitalized and amortized over their expected useful life on a straight-line basis not to exceed 5 years. Interest is capitalized on qualifying assets under development for internal use. Maintenance and repairs are charged to operations as incurred and major improvements are capitalized. The cost of assets retired or otherwise disposed of and the accumulated depreciation thereon are removed from the accounts with any gain or loss realized upon sale or disposal charged or credited to operations. We review long-lived assets for impairment when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. In the event that the undiscounted future cash flows resulting from the use of the asset group is less than the carrying amount, an impairment loss equal to the excess of the assets carrying amount over its fair value, less cost to dispose, is recorded.
	Goodwill and Other Intangibles: Goodwill represents the excess of purchase price over the fair market value of net assets acquired in connection with our business combinations. Goodwill and intangible assets that have indefinite useful lives are not amortized but are subject to annual impairment tests.
	We test goodwill for impairment annually in the fourth quarter or when events or changes in circumstances indicate the carrying value of this asset might exceed the current fair value. We test goodwill for impairment at the reporting unit level. We assess qualitative factors such as current company performance and overall economic factors to determine if it is more-likely-than-not that the goodwill might be impaired and whether it is necessary to perform the quantitative goodwill 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. In 2014 and 2013, we performed the qualitative assessment on both the Hub and Mode reporting units. No impairment charge was recognized based on the results of the goodwill impairment tests.
	On January 1, 2013, we adopted the FASB’s new accounting guidance regarding indefinite-lived intangibles which permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of the indefinite lived intangible asset is less than its carrying amount as a basis for determining whether it is necessary to perform the quantitative test discussed above. As a result of our impairment analysis, we recorded an impairment charge of $2.9 million in the fourth quarter of 2013, which is included in the Impairment of Trade Name line item in the Consolidated Statements of Income and Comprehensive Income. See Note 6 to the consolidated financial statements for information on this impairment charge.
	We evaluate the potential impairment of finite-lived acquired intangible assets when impairment indicators exist. If the carrying value is no longer recoverable based upon the undiscounted future cash flows of the asset, the amount of the impairment is the difference between the carrying amount and the fair value of the asset.
	Concentration of Credit Risk: Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We place our cash and temporary investments with high quality financial institutions in DDAs (Demand Deposit Accounts). We primarily serve customers located throughout the United States with no significant concentration in any one region. No one customer accounted for more than 10% of revenue in 2014, 2013 or 2012. We review a customer’s credit history before extending credit. In addition, we routinely assess the financial strength of our customers and, as a consequence, believe that our trade accounts receivable risk is limited.
	Revenue Recognition: Revenue is recognized at the time 1) persuasive evidence of an arrangement exists, 2) services have been rendered, 3) the sales price is fixed and determinable and 4) collectability is reasonably assured. Revenue and related transportation costs are recognized based on relative transit time. Further, in most cases, we report our revenue on a gross basis because we are the primary obligor as we are responsible for providing the service desired by the customer. Our customers view us as responsible for fulfillment including the acceptability of the service. Services requirements may include, for example, on-time delivery, handling freight loss and damage claims, setting up appointments for pick up and delivery and tracing shipments in transit. We have discretion in setting sales prices and as a result, the amount we earn varies. In addition, we have the discretion to select our vendors from multiple suppliers for the services ordered by our customers. Finally, we have credit risk for our receivables. These three factors, discretion in setting prices, discretion in selecting vendors and credit risk, further support reporting revenue on a gross basis for most of our revenue.
	Provision for Income Taxes: Deferred income taxes are recognized for the future tax effects of temporary differences between financial and income tax reporting using tax rates in effect for the years in which the differences are expected to reverse. We believe that it is more likely than not that our deferred tax assets will be realized based on future taxable income projections with the exception of $0.1 million related to state tax net operating losses for which a valuation allowance has been established. In the event the probability of realizing the remaining deferred tax assets do not meet the more likely than not threshold in the future, a valuation allowance would be established for the deferred tax assets deemed unrecoverable.
	Tax liabilities are recorded when, in management’s judgment, a tax position does not meet the more likely than not threshold for recognition as prescribed by the guidance. For tax positions that meet the more likely than not threshold, a tax liability may be recorded depending on management’s assessment of how the tax position will ultimately be settled. We recognize interest expense and penalties related to income tax liabilities in our provision for income taxes.
	Earnings Per Common Share: Basic earnings per common share are based on the average quarterly weighted average number of Class A and Class B shares of common stock outstanding. Diluted earnings per common share are adjusted for the assumed exercise of dilutive stock options and for restricted stock which are both computed using the treasury stock method.
	Stock Based Compensation: Share-based compensation includes the restricted stock awards expected to vest based on the grant date fair value. Compensation expense is amortized straight-line over the vesting period including an estimate of forfeitures and is included in salaries and benefits. We present excess tax benefits resulting from the exercise of share-based compensation as financing cash in-flows and as operating cash out-flows in the Consolidated Statements of Cash Flows.
	New Pronouncements: In May 2014, the Financial Accounting Standards Board (“FASB”) issued Update No. 2014-09—Revenue from Contracts with Customers (Topic 606).  This Standard provides guidance on how to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.  For public organizations, the guidance in the update is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period.  The update provides two transition methods to the new guidance: a retrospective approach and a modified retrospective approach.  Early application is not permitted.  We plan to adopt this standard January 1, 2017, as required. We are currently evaluating the transition method and effect this update will have on our consolidated financial statements.
	In April 2014, the Financial Accounting Standards Board (“FASB”) issued an update to Topic 360 – Property, Plant and Equipment and Topic 205 – Presentation of Financial Statements: Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.  The amendments in the update change the requirements for reporting discontinued operations in Subtopic 25-20.  The guidance is effective for annual reporting periods beginning after December 15, 2014, including interim reporting periods within that reporting period and is to be applied prospectively.  We adopted this standard January 1, 2015, as required.  We do not expect this new guidance to have a significant impact on our consolidated financial statements.
	Use of Estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates include the allowance for doubtful accounts, revenue, the cost of transportation, commission expense and useful lives of equipment. Actual results could differ from those estimates.
	Reclassifications: Certain prior year immaterial amounts have been reclassified in the segment footnote to conform with the current year presentation.

Capital_Structure

Capital Structure	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Capital Structure	NOTE 2. Capital Structure
	We have authorized common stock comprised of Class A Common Stock and Class B Common Stock. The rights of holders of Class A Common Stock and Class B Common Stock are identical, except each share of Class B Common Stock entitles its holder to approximately 80 votes, while each share of Class A Common Stock entitles its holder to one vote. We have authorized 2,000,000 shares of preferred stock.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 3. Earnings Per Share
	The following is a reconciliation of our earnings per share (in thousands, except for per share data):
		Years Ended, December 31,
		2014		2013		2012
	Net income for basic and diluted earnings per share	$	51,558	$	69,110	$	67,953
	Weighted average shares outstanding - basic		36,590		36,829		37,053
	Dilutive effect of  stock options and restricted stock		142		153		132
	Weighted average shares outstanding - diluted		36,732		36,982		37,185
	Earnings per share - basic	$	1.41	$	1.88	$	1.83
	Earnings per share - diluted	$	1.4	$	1.87	$	1.83

Impairment_of_Software

Impairment of Software	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of Software	NOTE 4. Impairment of Software
	In the third quarter of 2014, the Hub segment recorded a full write-off of $11.9 million related to software development costs as a result of our decision to terminate a long-term technology project. Upon deployment in the third quarter of 2014, it was discovered that the software did not properly integrate with our current systems or meet the criteria for which it was designed. We do not believe the software can be cost effectively salvaged and it has no value on the open market. This charge is included in Impairment of software in the Consolidated Statements of Income and Comprehensive Income.

Business_Segments

Business Segments	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Business Segments	NOTE 5. Business Segments
	We now report two distinct business segments. The first segment is Mode, which includes the Mode business we acquired on April 1, 2011. The second segment is Hub, which is all business other than Mode.
	Hub offers comprehensive intermodal, truck brokerage and logistics services. Our employees operate the freight through a network of operating centers located in the United States, Canada and Mexico. Each operating center is strategically located in a market with a significant concentration of shipping customers and one or more railheads. Hub has full time employees located throughout the United States, Canada and Mexico.
	Mode markets and operates its freight transportation services, consisting of intermodal, truck brokerage and logistics, primarily through agents who enter into contractual arrangements with Mode.
	The following is a summary of operating results, which includes the results of operations of the Mode segment for the years ended December 31, 2014, 2013 and 2012, and certain other financial data for our business segments (in thousands):
		Twelve Months									Twelve Months
		Ended December  31, 2014									Ended December  31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Revenue	$	2,722,799	$	931,131	$	(82,804	)	$	3,571,126	$	2,599,763	$	823,159	$	(49,024	)	$	3,373,898
	Transportation costs		2,461,144		822,351		(82,804	)		3,200,691		2,325,512		726,387		(49,024	)		3,002,875
	Gross margin		261,655		108,780		-			370,435		274,251		96,772		-			371,023
	Costs and expenses:
	Salaries and benefits		122,097		14,383		-			136,480		120,478		14,863		-			135,341
	Agent fees and commissions		45		61,996		-			62,041		1,372		54,417		-			55,789
	General and administrative		51,108		6,906		-			58,014		50,484		6,288		-			56,772
	Depreciation and amortization		6,238		1,561		-			7,799		4,326		2,144		-			6,470
	Driver settlements and related costs		10,343		-		-			10,343		-		-		-			-
	Impairment of software		11,881		-		-			11,881		-		-		-			-
	Impairment of trade name		-		-		-			-		2,904		-		-			2,904
	Total costs and expenses		201,712		84,846		-			286,558		179,564		77,712		-			257,276
	Operating income	$	59,943	$	23,934	$	-		$	83,877		94,687		19,060		-			113,747
	Capital expenditures	$	118,640	$	531	$	-		$	119,171	$	109,412	$	1,505	$            -			$	110,917
		Twelve Months
		Ended December  31, 2012
						Inter-			Hub
						Segment			Group
		Hub		Mode		Elims			Total
	Revenue	$	2,392,289	$	779,928	$	(48,109	)	$	3,124,108
	Transportation costs		2,128,942		687,209		(48,109	)		2,768,042
	Gross margin		263,347		92,719		-			356,066
	Costs and expenses:
	Salaries and benefits		113,855		15,288		-			129,143
	Agent fees and commissions		1,900		53,212		-			55,112
	General and administrative		45,411		7,421		-			52,832
	Depreciation and amortization		4,448		2,171		-			6,619
	Total costs and expenses		165,614		78,092		-			243,706
	Operating income	$	97,733	$	14,627	$	-		$	112,360
	Capital expenditures	$	54,266	$	2,616	$	-		$	56,882
		As of December 31, 2014									As of December 31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Total assets	$	1,030,722	$	189,787	$	(8,382	)	$	1,212,127	$	887,848	$	164,071	$	(3,976	)	$	1,047,943
	Goodwill		233,424		29,389		-			262,813		233,643		29,389		-			263,032
	The following tables summarize our revenue by segment and business line (in thousands):
		Twelve Months									Twelve Months
		Ended December 31, 2014									Ended December 31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Intermodal	$	1,815,842	$	466,859	$	(79,406	)	$	2,203,295	$	1,818,162	$	389,186	$	(46,401	)	$	2,160,947
	Truck brokerage		338,590		335,587		(946	)		673,231		333,027		311,930		(1,453	)		643,504
	Logistics		568,367		128,685		(2,452	)		694,600		448,574		122,043		(1,170	)		569,447
	Total revenue	$	2,722,799	$	931,131	$	(82,804	)	$	3,571,126	$	2,599,763	$	823,159	$	(49,024	)	$	3,373,898
		Twelve Months
		Ended December 31, 2012
						Inter-			Hub
						Segment			Group
		Hub		Mode		Elims			Total
	Intermodal	$	1,731,487	$	354,662	$	(43,863	)	$	2,042,286
	Truck brokerage		335,213		318,848		(2,945	)		651,116
	Logistics		325,589		106,418		(1,301	)		430,706
Total revenue	$	2,392,289	$	779,928	$	(48,109	)	$	3,124,108

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 6. Goodwill and Other Intangible Assets
	In accordance with the FASB issued guidance in the Intangibles-Goodwill and Other Topic of the Codification, we completed the required annual impairment tests. We performed a qualitative assessment on both the Hub segment goodwill and the Mode segment goodwill. No impairment charges were recognized based on the results of the annual goodwill assessments and there were no accumulated impairment losses of goodwill at the beginning of the period.
	The following table presents the carrying amount of goodwill (in thousands):
								Hub Group
		Hub			Mode			Total
	Balance at January 1, 2013	$	233,862		$	29,389		$	263,251
	Other		(219	)	-				(219	)
	Balance at December 31, 2013		233,643			29,389			263,032
	Other		(219	)	-				(219	)
	Balance at December 31, 2014	$	233,424		$	29,389		$	262,813
	The changes noted as “other” in the table above for both 2014 and 2013 refer to the amortization of the income tax benefit of tax goodwill in excess of financial statement goodwill.
	In December 2013, we decided to change our branding strategy for Comtrak Logistics which resulted in us retiring the Comtrak name. We decided to change the name of Comtrak to Hub Group Trucking, Inc. as we believe the name change will allow us to benefit from the valuable Hub Group name with customers, vendors and drivers. In conjunction with the strategy, the Comtrak name will no longer be used, resulting in no fair value and a write off of the asset. We recorded an impairment charge of $2.9 million in the fourth quarter of 2013, which is included in the Impairment of trade name line item in the Consolidated Statements of Income and Comprehensive Income.
	The components of the “Other intangible assets” are as follows (in thousands):
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2014:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,909	)	$	-		$	2,272	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,608	)	$	(2,904	)	$	2,272
	Mode
	Agency/customer relationships	$	15,362		$	(3,200	)	$	-		$	12,162	18  years
	Hub Group Total	$	25,146		$	(7,808	)	$	(2,904	)	$	14,434
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2013:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,467	)	$	-		$	2,714	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,166	)	$	(2,904	)	$	2,714
	Mode
	Agency/customer relationships	$	15,362		$	(2,347	)	$	-		$	13,015	18  years
	Hub Group Total	$	25,146		$	(6,513	)	$	(2,904	)	$	15,729
	The above intangible assets are amortized using the straight-line method. Amortization expense, excluding impairment, for each of the years ended December 31, 2014, 2013 and 2012 was $1.3 million, $1.4 million and $1.6 million, respectively. The remaining weighted average life of all definite lived intangible assets as of December 31, 2014 was 5.42 years and 14.25 years for Hub and Mode, respectively. Amortization expense for the next five years is as follows (in thousands):
								Hub Group
		Hub			Mode			Total
	2015	$	442		$	853		$	1,295
	2016		442			853			1,295
	2017		442			853			1,295
	2018		395			853			1,248
	2019		255			853			1,108

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 7. Income Taxes
	The following is a reconciliation of our effective tax rate to the federal statutory tax rate:
		Years Ended December 31,
		2014				2013				2012
	U.S. federal statutory rate		35		%		35		%		35		%
	State taxes, net of federal benefit		2.9			3.2				2.9
	State incentives		(0.8	)		-0.6				-
	State law changes		(0.9	)		0.1				0.3
	Nondeductible expenses		0.9			0.8				0.5
	Other		(0.1	)		0.1				0.2
	Net effective rate		37		%		38.6		%		38.9		%
	The following is a summary of our provision for income taxes (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Current
	Federal	$	5,939			$	22,880			$	30,375
	State and local		445				3,817				4,331
	Foreign		249				205				47
			6,633				26,902				34,753
	Deferred
	Federal		23,600				15,920				7,865
	State and local		191				627				693
	Foreign		(115	)			(4	)			(7	)
			23,676				16,543				8,551
	Total provision	$	30,309			$	43,445			$	43,304
	The following is a summary of our deferred tax assets and liabilities (in thousands):
		December 31,
		2014				2013
	Reserve for uncollectible accounts receivable	$	2,101			$	2,398
	Accrued compensation		7,161				8,175
	Other reserves		2,036				2,356
	Current deferred tax assets		11,298				12,929
	Accrued compensation		6,829				5,919
	Other reserves		764				545
	Operating loss carryforwards		1,387				883
	Less valuation allowance		(108	)			(108	)
	Non-current deferred tax assets		8,872				7,239
	Total deferred tax assets	$	20,170			$	20,168
	Prepaids	$	(1,551	)		$	(2,473	)
	Other receivables		(4,931	)			(4,630	)
	Current deferred tax liabilities		(6,482	)			(7,103	)
	Property and equipment		(67,726	)			(45,185	)
	Goodwill		(81,647	)			(79,889	)
	Non-current deferred tax liabilities		(149,373	)			(125,074	)
	Total deferred tax liabilities	$	(155,855	)		$	(132,177	)
	We are subject to income taxation in the U.S., numerous state jurisdictions, Mexico and Canada.  Because income tax return formats vary among the states, we file both unitary and separate company state income tax returns.  Our state tax net operating losses of $1.4 million expire between December 31, 2015 and December 31, 2034. Management believes it is more likely than not that the deferred tax assets will be realized with the exception of $0.1 million related to state tax net operating losses for which a valuation allowance has been established.
	As of December 31, 2014 and December 31, 2013, the amount of unrecognized tax benefits was $1.1 million and $0.5 million, respectively. Of these amounts, our income tax provision would decrease $0.7 million and $0.3 million respectively, if recognized. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
	Balance at January 1, 2013	$	783
	Additions for tax positions taken in prior years		17
	Reductions for tax positions taken in prior years		(184	)
	Reductions as a result of a lapse of the applicable statute of limitations		(157	)
	Balance at December 31, 2013	$	459
	Additions for tax positions taken in prior years		231
	Additions for tax positions related to the current year		587
	Reductions as a result of a lapse of the applicable statute of limitations		(212	)
	Balance at December 31, 2014	$	1,065
	We estimate it is reasonably possible that our reserve could either increase or decrease by $0.3 million during the next twelve months.
	We recognize interest expense and penalties related to income tax liabilities in our provision for income taxes.  In our 2014 provision for income taxes we recognized approximately one thousand dollars of net interest expense related to income tax liabilities and income tax penalties.
	In 2014, the IRS closed their examination of our 2011 and 2012 tax years with no changes.  Also in 2014, Illinois closed audits of our 2009 through 2011 tax years, Massachusetts closed audits of our 2010 through 2012 tax years and Texas closed audits of refund claims that we submitted for tax years 2007 through 2009.  We received $0.3 million net after offsetting small settlement payments against the refunds.  Although no other material examinations are currently in effect, tax years 2011 through 2013 generally remain open to examination by the major tax jurisdictions to which we are subject.

Fair_Value_Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 8. Fair Value Measurement
	The carrying value of cash and cash equivalents, accounts receivable, accounts payable and long term debt materially approximated fair value as of December 31, 2014 and 2013 due to their short-term nature.
	We consider as cash equivalents all highly liquid instruments with an original maturity of three months or less. As of December 31, 2014 and 2013, our cash and temporary investments were with high quality financial institutions in Demand Deposit Accounts.
	Restricted investments included $21.9 million and $20.8 million as of December 31, 2014 and 2013, respectively, of mutual funds which are reported at fair value.
	The fair value measurement of these securities is based on quoted prices in active markets for identical assets which are defined as “Level 1” of the fair value hierarchy in the Fair Value Measurements and Disclosures Topic of the Codification.

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Property and Equipment	NOTE 9. Property and Equipment
	Property and equipment consist of the following (in thousands):
		December 31,
		2014			2013
	Land	$	9,855		$	9,855
	Building and improvements		35,212			35,212
	Leasehold improvements		4,241			4,245
	Computer equipment and software		70,719			74,751
	Furniture and equipment		12,931			12,729
	Transportation equipment		346,055			236,900
			479,013			373,692
	Less:  Accumulated depreciation and amortization		(140,686	)		(113,292	)
	Property and Equipment, net	$	338,327		$	260,400
	The increase in transportation equipment to $346.1 million in 2014 from $236.9 million in 2013 was due primarily to the purchase of tractors and containers.
	Included in the transportation equipment is a capital lease obligation entered into for $26.4 million in 2011. The balances as of December 31, 2014 and 2013, net of accumulated amortization, were $17.4 million and $20.0 million, respectively.
	Depreciation and amortization expense related to property and equipment was $28.3 million, $20.2 million and $19.6 million for 2014, 2013 and 2012, respectively, which includes $2.6 million of amortization expense associated with a capital lease for each of the years ending 2014, 2013 and 2012. This amortization expense is included in transportation costs. Transportation equipment depreciation is included in transportation costs.

LongTerm_Debt_and_Financing_Ar

Long-Term Debt and Financing Arrangements	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Long-Term Debt and Financing Arrangements	NOTE 10. Long-Term Debt and Financing Arrangements
	In December 2013, we amended our Credit Agreement to reduce the interest rate and commitment fees and extend the term until December 2018. The maximum unsecured borrowing capacity remained at $50.0 million. The interest rate under the Credit Agreement ranges from LIBOR plus 1.00% to 1.75% or Prime to Prime plus 0.75%. The commitment fees charged on the unused line of credit are between 0.10% and 0.25% per annum. The financial covenants require a total leverage ratio of not more than 3.0 to 1.0 and an interest coverage ratio of not less than 2.0 to 1.0.
	We have standby letters of credit that expire in 2015. As of December 31, 2014, our letters of credit were $6.1 million.
	Our unused and available borrowings under our bank revolving line of credit were $43.9 million as of December 31, 2014 and $44.8 million as of December 31, 2013. We were in compliance with our debt covenants as of December 31, 2014.
	We have entered into various Equipment Notes (“Notes”) for the purchase of tractors and containers.  The Notes are secured by the underlying equipment financed in the agreements.
	Our outstanding debt is as follows (in thousands):
		Period Ended
		December 31,			December 31,
		2014			2013
	Secured Equipment Notes due in December 2019 with monthly principal and interest payments of $0.2 million commencing in January 2015; interest is paid monthly at a fixed annual rate of 2.24%	$	13,387		$	-
	Secured Equipment Notes due in November 2019 with monthly principal and interest payments of $0.5 million commencing in December 2014; interest is paid monthly at a fixed annual rate of 2.05%		28,429			-
	Secured Equipment Notes due in September 2019 with monthly principal and interest payments of $0.4 million commencing in September 2014; interest is paid monthly at a fixed annual rate of 2.15%		22,772			-
	Secured Equipment Notes due in February 2019 with monthly principal and interest payments of $0.4 million commencing in January 2014; interest is paid monthly at a fixed annual rate between 1.87% and 1.93%		21,016			-
	Secured Equipment Notes due in June 2018 with quarterly principal and interest payments of $0.5 million commencing in August 2013; interest is paid quarterly at a fixed annual rate between 1.9% and 2.0%		6,475			8,246
			92,079			8,246
	Less current portion		(19,619	)		(1,771	)
	Total long-term debt	$	72,460		$	6,475
	Aggregate principal payments, in thousands, due subsequent to December 31, 2014, are as follows:
	2015	$	19,619
	2016		20,023
	2017		20,209
	2018		19,668
	2019		12,560
		$	92,079
	In 2011, we entered into a lease agreement for 3,126 chassis for a period of 10 years. We are accounting for this lease as a capital lease. Interest on this capital lease obligation is based on interest rates that approximate currently available interest rates; therefore, indebtedness under this capital lease obligation approximates fair value.
	We paid interest of $0.8 million, $0.9 million and $1.0 million in 2014, 2013 and 2012, respectively, related to this capital lease.

Leases_User_Charges_and_Commit

Leases, User Charges and Commitments	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Leases, User Charges and Commitments	NOTE 11. Leases, User Charges and Commitments
	Minimum annual capital and operating lease payments, as of December 31, 2014, under non-cancelable leases, principally for containers, chassis, other equipment and real estate, as well as other commitments are payable as follows (in thousands):
	Future Payments Due:
					Operating
					Leases and
		Capital			Other
		Lease			Commitments		Total
	2015	$	3,179		$	9,686	$	12,865
	2016		3,188			7,476		10,664
	2017		3,179			5,676		8,855
	2018		3,179			3,926		7,105
	2019		3,179			2,820		5,999
	2020 and thereafter		5,037			7,361		12,398
		$	20,941		$	36,945	$	57,886
	Less: Imputed interest		(2,500	)
	Net capital lease liability	$	18,441
	Total rental expense included in general and administrative expense, which relates primarily to real estate, was approximately $8.1 million in 2014, $10.1 million in 2013 and $8.8 million in 2012. Many of the real estate leases contain renewal options and escalation clauses which require payments of additional rent to the extent of increases in the related operating costs. We straight-line rental expense in accordance with the FASB guidance in the Leases Topic of the Codification.
	We incur rental expense for our leased containers, tractors and trailers that are included in transportation costs and totaled $13.1 million, $10.2 million, and $9.3 million for 2014, 2013 and 2012, respectively.
	We incur user charges for use of a fleet of rail owned chassis, chassis under capital lease and dedicated rail owned containers on the Union Pacific and Norfolk Southern railroads which are included in transportation costs. Such charges were $67.8 million, $69.1 million and $67.0 million for 2014, 2013 and 2012, respectively. As of December 31, 2013, we have the ability to return the majority of the containers and pay for the rail owned chassis only when we are using them under these agreements. As a result, no minimum commitments related to these rail owned chassis and containers have been included in the table above.

Guarantees

Guarantees	12 Months Ended
	Dec. 31, 2014
Guarantees [Abstract]
Guarantees	NOTE 12. Guarantees
	As a recruiting tool for our owner-operators, we are guaranteeing certain owner-operators’ lease payments for tractors. The guarantees expire at various dates through 2020.
	The potential maximum exposure under these lease guarantees was approximately $27.2 million and $39.0 million as of December 31, 2014 and 2013, respectively. The potential maximum exposure represents the amount of the remaining lease payments on all outstanding guaranteed leases as of December 31, 2014 and 2013. However, upon default, we have the option to purchase the tractors. We could then sell the tractors and use the proceeds to recover all or a portion of the amounts paid under the guarantees. Alternatively, we can contract with another owner operator who would assume the lease or continue to operate the leased tractor in our company fleet. There were no material defaults during the years ended December 31, 2014 and 2013 and no potential material defaults.
	We had a liability of approximately $0.3 million at December 31, 2014 and $0.7 million as of December 31, 2013, representing the fair value for estimated defaults of the guarantees, based on a discounted cash-flow analysis which is included in current and non-current liabilities in our Consolidated Balance Sheets. We are amortizing the amounts over the remaining lives of the respective guarantees.

StockBased_Compensation_Plans

Stock-Based Compensation Plans	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation Plans	NOTE 13. Stock-Based Compensation Plans
	In 1996, we adopted a Long-Term Incentive Plan (the “1996 Incentive Plan”). The number of shares of Class A Common Stock reserved for issuance under the 1996 Incentive Plan was 1,800,000. In 1997, we adopted a second Long-Term Incentive Plan (the “1997 Incentive Plan”). The number of shares of Class A Common Stock reserved for issuance under the 1997 Incentive Plan was 600,000. In 1999 we adopted a third Long-Term Incentive Plan (the “1999 Incentive Plan”). The number of shares of Class A Common Stock reserved for issuance under the 1999 Incentive Plan was 2,400,000. In 2002, we adopted a fourth Long-Term Incentive Plan (the “2002 Incentive Plan”). The number of shares of Class A Common Stock reserved for issuance under the 2002 Incentive Plan was 2,400,000. In 2003, we amended our 2002 Incentive Plan to add an additional 2,000,000 shares of Class A Common Stock that are reserved for issuance. In 2007, we amended our 2002 Incentive Plan to add an additional 1,000,000 shares of Class A Common Stock that are reserved for issuance. Under the 2002 Incentive Plan, stock options, stock appreciation rights, restricted stock, restricted stock units and performance units may be granted for the purpose of attracting and motivating our key employees and non-employee directors. We have not granted any stock options since 2003 and have no stock options outstanding. Restricted stock vests over a three to five year period. As of December 31, 2014, 726,640 shares were available for future grant. When stock options are exercised, either new shares are issued or shares are issued out of treasury.
	Share-based compensation expense for 2014, 2013 and 2012 was $8.3 million, $7.7 million and $6.5 million or $5.2 million, $4.6 million and $4.0 million, net of taxes, respectively.
	Intrinsic value for stock options is defined as the difference between the current market value and the grant price. There were no options exercised during the year ended December 31, 2014.  The total intrinsic value of options exercised during the years ended December 31, 2013 and 2012 was $0.6 million and $1.2 million, respectively. Cash received from stock options exercised during the years ended December 31, 2013 and 2012 was $0.04 million and $0.07 million, respectively. The tax benefit realized for tax deductions from stock options exercised for the years ended December 31, 2013 and 2012 was $0.2 million and $0.5 million, respectively.
	The following table summarizes the non-vested restricted stock activity for the year ended December 31, 2014:
				Weighted
				Average
				Grant Date
	Non-vested restricted stock	Shares		Fair Value
	Non-vested January 1, 2014	761,702		$	33.09
	Granted	293,910		$	39.66
	Vested	-236,015		$	32.01
	Forfeited	-90,927		$	35.39
	Non-vested at December 31, 2014	728,670		$	35.81
	The following table summarizes the restricted stock granted during the respective years:
	Restricted stock grants	2014				2013		2012
	Employees		273,910				280,900		276,017
	Outside directors		20,000				20,000		20,000
	Total		293,910				300,900		296,017
	Weighted average grant date fair value	$	39.66			$	34.64	$	32.62
	Vesting period	3-5 years				3-5 years		3-5 years
	The fair value of non-vested restricted stock is equal to the market price of our stock at the date of grant.
	The total fair value of restricted shares vested during the years ended December 31, 2014, 2013 and 2012 was $9.4 million, $7.5 million and $5.4 million, respectively.
	As of December 31, 2014, there was $19.0 million of unrecognized compensation cost related to non-vested share-based compensation that is expected to be recognized over a weighted average period of 2.77 years.
	During January 2015, we granted 252,869 shares of restricted stock to certain employees and 22,000 shares of restricted stock to outside directors with a weighted average grant date fair value of $37.31. The stock vests over a three to five year period.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 14. Employee Benefit Plans
	We had one profit-sharing plan and trust as of December 31, 2014, 2013 and 2012, all under section 401(k) of the Internal Revenue Code. At our discretion, we partially match qualified contributions made by employees to the plan. We incurred expense of $1.9 million, $1.8 million and $1.6 million related to these plans in 2014, 2013, and 2012, respectively.
	In January 2005, we established the Hub Group, Inc. Nonqualified Deferred Compensation Plan (the “Plan”) to provide added incentive for the retention of certain key employees. Under the Plan, participants can elect to defer certain compensation. Accounts will grow on a tax-deferred basis to the participant. Restricted investments included in the Consolidated Balance Sheets represent the fair value of the mutual funds and other security investments related to the Plan as of December 31, 2014 and 2013. Both realized and unrealized gains and losses are included in income and expense and offset the change in the deferred compensation liability. We provide a 50% match on the first 6% of employee compensation deferred under the Plan, with a maximum match equivalent to 3% of base salary. In addition, we have a legacy deferred compensation plan. There are no new contributions being made into this legacy plan.
	We incurred expense of $0.3 million, $0.4 million and $0.3 million related to the employer match for these plans in 2014, 2013 and 2012, respectively. The liabilities related to these plans as of December 31, 2014 and 2013 were $22.4 million and $21.5 million, respectively.

Legal_Matters

Legal Matters	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Legal Matters	NOTE 15. Legal Matters
	We are a party to litigation incident to our business, including claims for personal injury and/or property damage, bankruptcy preference claims, and claims regarding freight lost or damaged in transit, improperly shipped or improperly billed. Some of the lawsuits to which we are party are covered by insurance and are being defended by our insurance carriers. Some of the lawsuits are not covered by insurance and we defend those ourselves. We do not believe that the outcome of this litigation will have a materially adverse effect on our financial position or results of operations.
	On January 25, 2013, a complaint was filed in the U.S. District Court for the Eastern District of California (Sacramento Division) by Salvador Robles against our subsidiary, Comtrak Logistics, Inc., now known as Hub Group Trucking, Inc. Mr. Robles drove a truck for Hub Group Trucking in California, first as an independent contractor and then as an employee. The action seeks class certification on behalf of a class comprised of present and former California-based truck drivers for Hub Group Trucking who were classified as independent contractors, from January 2009 to the present. The complaint alleges Hub Group Trucking has misclassified such drivers as independent contractors and that such drivers were employees. The complaint asserts various violations of the California Labor Code and claims that Hub Group Trucking has engaged in unfair competition practices. The complaint seeks, among other things, declaratory and injunctive relief, compensatory damages and attorney’s fees. In May 2013, the complaint was amended to add similar claims based on Mr. Robles’ status as an employed company driver. These additional claims are only on behalf of Mr. Robles and not a putative class. In August 2013, the district court stayed proceedings in the case pending decisions by the Court of Appeals for the 9th Circuit to decide whether the claims in two cases raising some similar claims should be dismissed on federal preemption grounds. In July 2014, the Court of Appeals ruled that the claims in those cases were not preempted. The case is now proceeding.
	Two other complaints alleging substantially similar claims were filed in the Superior Court of the State of California for the County of San Bernardino.  On July 24, 2014, Carlos Barillas filed a complaint against Hub Group Trucking seeking class certification.  On October 1, 2014, Jorge Cabrera filed a complaint against Hub Group Trucking and Hub Group, Inc. on behalf of himself individually and not on behalf of a class.  On November 24, 2014, Hub Group Trucking removed both cases to federal court in Los Angeles.   By agreement of the parties, on December 19, 2014 the Barillas case was dismissed and we expect the claims of Mr. Barillas to be added to the Robles case.  On February 6, 2015 the Cabrera case was dismissed with prejudice pursuant to a settlement between parties.
	The Company believes that the California independent contractor truck drivers were properly classified as independent contractors at all times. Nevertheless, because lawsuits are expensive, time-consuming and could interrupt our business operations, we decided to make settlement offers to individual drivers with respect to the claims alleged in these lawsuits, without admitting liability. As of February 11, 2015, 92% of the drivers have accepted the settlement offers.  Though counsel for Mr. Robles has threatened to challenge the enforceability of these settlements, we believe they are valid and enforceable.  In the third quarter of 2014, driver settlements and related costs include $9.3 million in settlements for individual drivers and $1.0 million of related legal, communication and implementation costs.
	On September 12, 2014, a complaint was filed in the U.S. District Court for the Northern District of Illinois (Eastern Division) by Christian Lubinski against Hub Group Trucking. The action seeks class certification on behalf of a class comprised of present and former owner-operators providing delivery services in Illinois for Hub Group Trucking. The complaint alleges Hub Group Trucking has misclassified such drivers as independent contractors and that such drivers are employees. The complaint alleges that Hub Group Trucking has made illegal deductions from the drivers’ pay and has failed to properly compensate the drivers for all hours worked, reimburse business expenses, pay employment taxes, and provide workers’ compensation and other employment benefits. The complaint asserts various violations of the Illinois Wage Payment and Collections Act and claims that Hub Group Trucking has been unjustly enriched. The complaint seeks, among other things, monetary damages for the relevant statutory period and attorneys’ fees.  On October 24, 2014, the Lubinski case was transferred to the U.S. District Court for the Western District of Tennessee (Western Division), in Memphis.
	We cannot reasonably estimate at this time the possible loss or range of loss, if any, that may arise from the remaining unresolved claims in the Robles, Barillas and Lubinski lawsuits.

Stock_Buy_Back_Plans

Stock Buy Back Plans	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Stock Buy Back Plans	NOTE 16. Stock Buy Back Plans
	In November 2012, our Board of Directors authorized the purchase of up to $25.0 million of our Class A Common Stock.  This authorization expired December 31, 2013.  We purchased 377,906 shares during the year ended December 31, 2013.
	On October 22, 2014, our Board of Directors authorized the purchase of up to $75.0 million of our Class A Common Stock. This authorization expires December 31, 2015. We purchased 501,271 shares under this authorization during the year ended December 31, 2014.
	We purchased 80,772 shares for $3.2 million and 75,995 shares for $2.6 million during the years ended December 31, 2014 and 2013, respectively, related to employee withholding upon vesting of restricted stock.
	The following table displays the number of shares purchased during 2014 and the maximum value of shares that may yet be purchased under the plan:
								Maximum Value of
		Total				Total Number of		Shares that May Yet
		Number of		Average		Shares Purchased as		Be Purchased Under
		Shares		Price Paid		Part of Publicly		the Plan
		Purchased		Per Share		Announced Plan		(in 000’s)
	October 22 to October 31		310,982	$	35.22		310,982	$	64,047
	November 1 to November 30		190,289	$	37.16		190,289	$	56,977
	December 1 to December 31		-	$	-		-	$	56,977
	Total		501,271	$	35.96		501,271	$	56,977
	This table excludes 80,772 shares we purchased for $3.2 million during the year ended December 31, 2014 related to employee withholding upon vesting of restricted stock.

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (Unaudited)	NOTE 17. Selected Quarterly Financial Data (Unaudited)
	The following table sets forth the selected quarterly financial data for each of the quarters in 2014 (in thousands, except per share amounts):
		Quarter Ended
		March 31,		June 30,		September 30,		December 31,
		2014		2014		2014		2014
	Year Ended December 31, 2014:
	Revenue	$	848,449	$	893,930	$	913,386	$	915,361
	Gross margin		88,744		98,585		93,196		89,910
	Operating income		20,496		30,927		7,677		24,777
	Net income		12,035		18,676		4,491		16,356
	Basic earnings per share	$	0.33	$	0.51	$	0.12	$	0.45
	Diluted earnings per share	$	0.33	$	0.51	$	0.12	$	0.45
	The following table sets forth the selected quarterly financial data for each of the quarters in 2013 (in thousands, except per share amounts):
		Quarter Ended
		March 31,		June 30,		September 30,		December 31,
		2013		2013		2013		2013
	Year Ended December 31, 2013:
	Revenue	$	768,980	$	836,685	$	882,981	$	885,252
	Gross margin		87,338		95,473		93,124		95,088
	Operating income		24,737		30,464		31,295		27,251
	Net income		15,364		18,610		18,600		16,536
	Basic earnings per share	$	0.42	$	0.5	$	0.5	$	0.45
	Diluted earnings per share	$	0.42	$	0.5	$	0.5	$	0.45

Subsequent_Event

Subsequent Event	12 Months Ended
	Dec. 31, 2014
Subsequent Events [Abstract]
Subsequent Event	NOTE 18.  Subsequent Events
	In January 2015 we entered into an agreement to finance tractors for $2.2 million using secured debt with a five year term at an interest rate of 2.26% and we entered into an agreement to finance containers for $7.0 million using secured debt with a five year term at an interest rate of 1.72%.  Monthly payments of $0.2 million begin in February 2015.

VALUATION_AND_QUALIFYING_ACCOU

VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2014
Valuation And Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II
	HUB GROUP, INC.
	VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
	Allowance for uncollectible trade accounts
		Balance at		Charged to			Charged to						Balance at
	Year Ended	Beginning of		Costs &			Other						End of
	December 31:	Year		Expenses			Accounts (1)			Deductions (2)			Year
	2014	$	7,446,000	$	129,000		$	(565,000	)	$	(20,000	)	$	6,990,000
	2013	$	6,689,000	$	662,000		$	142,000		$	(47,000	)	$	7,446,000
	2012	$	7,730,000	$	208,000		$	(623,000	)	$	(626,000	)	$	6,689,000
	Deferred tax valuation allowance
		Balance at		Charged to			Balance at
	Year Ended	Beginning of		Costs &			End of
	December 31:	Year		Expenses			Year
	2014	$	108,000	$	-		$	108,000
	2013	$	122,000	$	(14,000	)	$	108,000
	2012	$	108,000	$	14,000		$	122,000
	-1	Expected customer account adjustments charged to revenue and write-offs, net of recoveries.
	-2	Represents bad debt recoveries.

Description_of_Business_and_Su1

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Business	Business: Hub Group, Inc. (“we”, “us” or “our”) provides intermodal transportation services utilizing primarily third party arrangements with railroads. Drayage can be provided by our subsidiary, Hub Group Trucking, Inc., or a third party company. We also arrange for transportation of freight by truck and perform logistics services. Transportation services are provided through our legacy business and our acquisition, Mode Transportation, LLC. We report two distinct business segments. The first segment is Mode, which includes the Mode business we acquired on April 1, 2011. The other segment is Hub, which is all business other than Mode. “Hub Group” includes both segments.
Principles of Consolidation	Principles of Consolidation: The consolidated financial statements include our accounts and all entities in which we have more than a 50% equity ownership or otherwise exercise unilateral control. All significant intercompany balances and transactions have been eliminated.
Cash and Cash Equivalents	Cash and Cash Equivalents: We consider as cash equivalents all highly liquid instruments with an original maturity of three months or less. As of December 31, 2014 and 2013, our cash and temporary investments were with high quality financial institutions in DDAs (Demand Deposit Accounts).
Accounts Receivable and Allowance for Uncollectible Accounts	Accounts Receivable and Allowance for Uncollectible Accounts: In the normal course of business, we extend credit to customers after a review of each customer’s credit history. An allowance for uncollectible trade accounts has been established through an analysis of the accounts receivable aging, an assessment of collectability based on historical trends and an evaluation based on current economic conditions. To be more specific, we reserve a portion of every account balance that has aged over one year, a portion of receivables for customers in bankruptcy and certain account balances specifically identified as uncollectible. On an annual basis, we perform a hindsight analysis on Hub and Mode separately to determine each segment’s experience in collecting account balances over one year old and account balances in bankruptcy. We then use this hindsight analysis to establish our reserves for receivables over one year and in bankruptcy. In establishing a reserve for certain account balances specifically identified as uncollectible, we consider the aging of the customer receivables, the specific details as to why the receivable has not been paid, the customer’s current and projected financial results, the customer’s ability to meet and sustain their financial commitments, the positive or negative effects of the current and projected industry outlook and the general economic conditions. The allowance for uncollectible accounts is reported on the balance sheet in net accounts receivable. Our reserve for uncollectible accounts was approximately $7.0 million and $7.4 million as of December 31, 2014 and 2013, respectively. Receivables are written off once collection efforts have been exhausted. Recoveries of receivables previously charged off are recorded when received.
Property and Equipment	Property and Equipment: Property and equipment are stated at cost. Depreciation of property and equipment is computed using the straight-line method at rates adequate to depreciate the cost of the applicable assets over their expected useful lives: building and improvements, up to 40 years; leasehold improvements, the shorter of useful life or lease term; computer equipment and software, up to 5 years; furniture and equipment, up to 10 years; and transportation equipment up to 15 years. Direct costs related to internally developed software projects are capitalized and amortized over their expected useful life on a straight-line basis not to exceed 5 years. Interest is capitalized on qualifying assets under development for internal use. Maintenance and repairs are charged to operations as incurred and major improvements are capitalized. The cost of assets retired or otherwise disposed of and the accumulated depreciation thereon are removed from the accounts with any gain or loss realized upon sale or disposal charged or credited to operations. We review long-lived assets for impairment when events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. In the event that the undiscounted future cash flows resulting from the use of the asset group is less than the carrying amount, an impairment loss equal to the excess of the assets carrying amount over its fair value, less cost to dispose, is recorded.
Goodwill and Other Intangibles	Goodwill and Other Intangibles: Goodwill represents the excess of purchase price over the fair market value of net assets acquired in connection with our business combinations. Goodwill and intangible assets that have indefinite useful lives are not amortized but are subject to annual impairment tests.
	We test goodwill for impairment annually in the fourth quarter or when events or changes in circumstances indicate the carrying value of this asset might exceed the current fair value. We test goodwill for impairment at the reporting unit level. We assess qualitative factors such as current company performance and overall economic factors to determine if it is more-likely-than-not that the goodwill might be impaired and whether it is necessary to perform the quantitative goodwill 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. In 2014 and 2013, we performed the qualitative assessment on both the Hub and Mode reporting units. No impairment charge was recognized based on the results of the goodwill impairment tests.
	On January 1, 2013, we adopted the FASB’s new accounting guidance regarding indefinite-lived intangibles which permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of the indefinite lived intangible asset is less than its carrying amount as a basis for determining whether it is necessary to perform the quantitative test discussed above. As a result of our impairment analysis, we recorded an impairment charge of $2.9 million in the fourth quarter of 2013, which is included in the Impairment of Trade Name line item in the Consolidated Statements of Income and Comprehensive Income. See Note 6 to the consolidated financial statements for information on this impairment charge.
	We evaluate the potential impairment of finite-lived acquired intangible assets when impairment indicators exist. If the carrying value is no longer recoverable based upon the undiscounted future cash flows of the asset, the amount of the impairment is the difference between the carrying amount and the fair value of the asset.
Concentration of Credit Risk	Concentration of Credit Risk: Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We place our cash and temporary investments with high quality financial institutions in DDAs (Demand Deposit Accounts). We primarily serve customers located throughout the United States with no significant concentration in any one region. No one customer accounted for more than 10% of revenue in 2014, 2013 or 2012. We review a customer’s credit history before extending credit. In addition, we routinely assess the financial strength of our customers and, as a consequence, believe that our trade accounts receivable risk is limited.
Revenue Recognition	Revenue Recognition: Revenue is recognized at the time 1) persuasive evidence of an arrangement exists, 2) services have been rendered, 3) the sales price is fixed and determinable and 4) collectability is reasonably assured. Revenue and related transportation costs are recognized based on relative transit time. Further, in most cases, we report our revenue on a gross basis because we are the primary obligor as we are responsible for providing the service desired by the customer. Our customers view us as responsible for fulfillment including the acceptability of the service. Services requirements may include, for example, on-time delivery, handling freight loss and damage claims, setting up appointments for pick up and delivery and tracing shipments in transit. We have discretion in setting sales prices and as a result, the amount we earn varies. In addition, we have the discretion to select our vendors from multiple suppliers for the services ordered by our customers. Finally, we have credit risk for our receivables. These three factors, discretion in setting prices, discretion in selecting vendors and credit risk, further support reporting revenue on a gross basis for most of our revenue.
Provision for Income Taxes	Provision for Income Taxes: Deferred income taxes are recognized for the future tax effects of temporary differences between financial and income tax reporting using tax rates in effect for the years in which the differences are expected to reverse. We believe that it is more likely than not that our deferred tax assets will be realized based on future taxable income projections with the exception of $0.1 million related to state tax net operating losses for which a valuation allowance has been established. In the event the probability of realizing the remaining deferred tax assets do not meet the more likely than not threshold in the future, a valuation allowance would be established for the deferred tax assets deemed unrecoverable.
	Tax liabilities are recorded when, in management’s judgment, a tax position does not meet the more likely than not threshold for recognition as prescribed by the guidance. For tax positions that meet the more likely than not threshold, a tax liability may be recorded depending on management’s assessment of how the tax position will ultimately be settled. We recognize interest expense and penalties related to income tax liabilities in our provision for income taxes.
Earnings Per Common Share
	Earnings Per Common Share: Basic earnings per common share are based on the average quarterly weighted average number of Class A and Class B shares of common stock outstanding. Diluted earnings per common share are adjusted for the assumed exercise of dilutive stock options and for restricted stock which are both computed using the treasury stock method.
Stock Based Compensation	Stock Based Compensation: Share-based compensation includes the restricted stock awards expected to vest based on the grant date fair value. Compensation expense is amortized straight-line over the vesting period including an estimate of forfeitures and is included in salaries and benefits. We present excess tax benefits resulting from the exercise of share-based compensation as financing cash in-flows and as operating cash out-flows in the Consolidated Statements of Cash Flows.
New Pronouncements
	New Pronouncements: In May 2014, the Financial Accounting Standards Board (“FASB”) issued Update No. 2014-09—Revenue from Contracts with Customers (Topic 606).  This Standard provides guidance on how to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.  For public organizations, the guidance in the update is effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period.  The update provides two transition methods to the new guidance: a retrospective approach and a modified retrospective approach.  Early application is not permitted.  We plan to adopt this standard January 1, 2017, as required. We are currently evaluating the transition method and effect this update will have on our consolidated financial statements.
	In April 2014, the Financial Accounting Standards Board (“FASB”) issued an update to Topic 360 – Property, Plant and Equipment and Topic 205 – Presentation of Financial Statements: Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.  The amendments in the update change the requirements for reporting discontinued operations in Subtopic 25-20.  The guidance is effective for annual reporting periods beginning after December 15, 2014, including interim reporting periods within that reporting period and is to be applied prospectively.  We adopted this standard January 1, 2015, as required.  We do not expect this new guidance to have a significant impact on our consolidated financial statements.
Use of Estimates	Use of Estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates include the allowance for doubtful accounts, revenue, the cost of transportation, commission expense and useful lives of equipment. Actual results could differ from those estimates.
Reclassifications	Reclassifications: Certain prior year immaterial amounts have been reclassified in the segment footnote to conform with the current year presentation.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Reconciliation of Earnings Per Share	The following is a reconciliation of our earnings per share (in thousands, except for per share data):
		Years Ended, December 31,
		2014		2013		2012
	Net income for basic and diluted earnings per share	$	51,558	$	69,110	$	67,953
	Weighted average shares outstanding - basic		36,590		36,829		37,053
	Dilutive effect of  stock options and restricted stock		142		153		132
	Weighted average shares outstanding - diluted		36,732		36,982		37,185
	Earnings per share - basic	$	1.41	$	1.88	$	1.83
	Earnings per share - diluted	$	1.4	$	1.87	$	1.83

Business_Segments_Tables

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Summary of Operating Results	The following is a summary of operating results, which includes the results of operations of the Mode segment for the years ended December 31, 2014, 2013 and 2012, and certain other financial data for our business segments (in thousands):
		Twelve Months									Twelve Months
		Ended December  31, 2014									Ended December  31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Revenue	$	2,722,799	$	931,131	$	(82,804	)	$	3,571,126	$	2,599,763	$	823,159	$	(49,024	)	$	3,373,898
	Transportation costs		2,461,144		822,351		(82,804	)		3,200,691		2,325,512		726,387		(49,024	)		3,002,875
	Gross margin		261,655		108,780		-			370,435		274,251		96,772		-			371,023
	Costs and expenses:
	Salaries and benefits		122,097		14,383		-			136,480		120,478		14,863		-			135,341
	Agent fees and commissions		45		61,996		-			62,041		1,372		54,417		-			55,789
	General and administrative		51,108		6,906		-			58,014		50,484		6,288		-			56,772
	Depreciation and amortization		6,238		1,561		-			7,799		4,326		2,144		-			6,470
	Driver settlements and related costs		10,343		-		-			10,343		-		-		-			-
	Impairment of software		11,881		-		-			11,881		-		-		-			-
	Impairment of trade name		-		-		-			-		2,904		-		-			2,904
	Total costs and expenses		201,712		84,846		-			286,558		179,564		77,712		-			257,276
	Operating income	$	59,943	$	23,934	$	-		$	83,877		94,687		19,060		-			113,747
	Capital expenditures	$	118,640	$	531	$	-		$	119,171	$	109,412	$	1,505	$            -			$	110,917
		Twelve Months
		Ended December  31, 2012
						Inter-			Hub
						Segment			Group
		Hub		Mode		Elims			Total
	Revenue	$	2,392,289	$	779,928	$	(48,109	)	$	3,124,108
	Transportation costs		2,128,942		687,209		(48,109	)		2,768,042
	Gross margin		263,347		92,719		-			356,066
	Costs and expenses:
	Salaries and benefits		113,855		15,288		-			129,143
	Agent fees and commissions		1,900		53,212		-			55,112
	General and administrative		45,411		7,421		-			52,832
	Depreciation and amortization		4,448		2,171		-			6,619
	Total costs and expenses		165,614		78,092		-			243,706
	Operating income	$	97,733	$	14,627	$	-		$	112,360
	Capital expenditures	$	54,266	$	2,616	$	-		$	56,882
Schedule of Assets
		As of December 31, 2014									As of December 31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Total assets	$	1,030,722	$	189,787	$	(8,382	)	$	1,212,127	$	887,848	$	164,071	$	(3,976	)	$	1,047,943
	Goodwill		233,424		29,389		-			262,813		233,643		29,389		-			263,032
Summary of Revenue by Segment and Business Line	The following tables summarize our revenue by segment and business line (in thousands):
		Twelve Months									Twelve Months
		Ended December 31, 2014									Ended December 31, 2013
						Inter-			Hub						Inter-			Hub
						Segment			Group						Segment			Group
		Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
	Intermodal	$	1,815,842	$	466,859	$	(79,406	)	$	2,203,295	$	1,818,162	$	389,186	$	(46,401	)	$	2,160,947
	Truck brokerage		338,590		335,587		(946	)		673,231		333,027		311,930		(1,453	)		643,504
	Logistics		568,367		128,685		(2,452	)		694,600		448,574		122,043		(1,170	)		569,447
	Total revenue	$	2,722,799	$	931,131	$	(82,804	)	$	3,571,126	$	2,599,763	$	823,159	$	(49,024	)	$	3,373,898
		Twelve Months
		Ended December 31, 2012
						Inter-			Hub
						Segment			Group
		Hub		Mode		Elims			Total
	Intermodal	$	1,731,487	$	354,662	$	(43,863	)	$	2,042,286
	Truck brokerage		335,213		318,848		(2,945	)		651,116
	Logistics		325,589		106,418		(1,301	)		430,706
	Total revenue	$	2,392,289	$	779,928	$	(48,109	)	$	3,124,108

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill	The following table presents the carrying amount of goodwill (in thousands):
								Hub Group
		Hub			Mode			Total
	Balance at January 1, 2013	$	233,862		$	29,389		$	263,251
	Other		(219	)	-				(219	)
	Balance at December 31, 2013		233,643			29,389			263,032
	Other		(219	)	-				(219	)
	Balance at December 31, 2014	$	233,424		$	29,389		$	262,813
Components of Other Intangible Assets	The components of the “Other intangible assets” are as follows (in thousands):
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2014:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,909	)	$	-		$	2,272	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,608	)	$	(2,904	)	$	2,272
	Mode
	Agency/customer relationships	$	15,362		$	(3,200	)	$	-		$	12,162	18  years
	Hub Group Total	$	25,146		$	(7,808	)	$	(2,904	)	$	14,434
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2013:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,467	)	$	-		$	2,714	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,166	)	$	(2,904	)	$	2,714
	Mode
	Agency/customer relationships	$	15,362		$	(2,347	)	$	-		$	13,015	18  years
	Hub Group Total	$	25,146		$	(6,513	)	$	(2,904	)	$	15,729
Components of Other Intangible Assets	The components of the “Other intangible assets” are as follows (in thousands):
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2014:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,909	)	$	-		$	2,272	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,608	)	$	(2,904	)	$	2,272
	Mode
	Agency/customer relationships	$	15,362		$	(3,200	)	$	-		$	12,162	18  years
	Hub Group Total	$	25,146		$	(7,808	)	$	(2,904	)	$	14,434
								Accumulated			Net
		Gross			Accumulated			Impairment			Carrying
	As of December 31, 2013:	Amount			Amortization			Loss			Value		Life
	Hub
	Customer relationships	$	5,181		$	(2,467	)	$	-		$	2,714	7-15  years
	Trade name		2,904			-			(2,904	)		-	Indefinite
	Relationships with owner operators		1,179			(1,179	)		-			-	2-6 years
	Information technology		500			(500	)		-			-	6 years
	Backlog/open orders		20			(20	)		-			-	1 month
	Hub Total	$	9,784		$	(4,166	)	$	(2,904	)	$	2,714
	Mode
	Agency/customer relationships	$	15,362		$	(2,347	)	$	-		$	13,015	18  years
	Hub Group Total	$	25,146		$	(6,513	)	$	(2,904	)	$	15,729
Amortization Expense	Amortization expense for the next five years is as follows (in thousands):
								Hub Group
		Hub			Mode			Total
	2015	$	442		$	853		$	1,295
	2016		442			853			1,295
	2017		442			853			1,295
	2018		395			853			1,248
	2019		255			853			1,108

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate	The following is a reconciliation of our effective tax rate to the federal statutory tax rate:
		Years Ended December 31,
		2014				2013				2012
	U.S. federal statutory rate		35		%		35		%		35		%
	State taxes, net of federal benefit		2.9			3.2				2.9
	State incentives		(0.8	)		-0.6				-
	State law changes		(0.9	)		0.1				0.3
	Nondeductible expenses		0.9			0.8				0.5
	Other		(0.1	)		0.1				0.2
	Net effective rate		37		%		38.6		%		38.9		%
Summary of Provision for Income Taxes	The following is a summary of our provision for income taxes (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Current
	Federal	$	5,939			$	22,880			$	30,375
	State and local		445				3,817				4,331
	Foreign		249				205				47
			6,633				26,902				34,753
	Deferred
	Federal		23,600				15,920				7,865
	State and local		191				627				693
	Foreign		(115	)			(4	)			(7	)
			23,676				16,543				8,551
	Total provision	$	30,309			$	43,445			$	43,304
Summary of Deferred Tax Assets and Liabilities	The following is a summary of our deferred tax assets and liabilities (in thousands):
		December 31,
		2014				2013
	Reserve for uncollectible accounts receivable	$	2,101			$	2,398
	Accrued compensation		7,161				8,175
	Other reserves		2,036				2,356
	Current deferred tax assets		11,298				12,929
	Accrued compensation		6,829				5,919
	Other reserves		764				545
	Operating loss carryforwards		1,387				883
	Less valuation allowance		(108	)			(108	)
	Non-current deferred tax assets		8,872				7,239
	Total deferred tax assets	$	20,170			$	20,168
	Prepaids	$	(1,551	)		$	(2,473	)
	Other receivables		(4,931	)			(4,630	)
	Current deferred tax liabilities		(6,482	)			(7,103	)
	Property and equipment		(67,726	)			(45,185	)
	Goodwill		(81,647	)			(79,889	)
	Non-current deferred tax liabilities		(149,373	)			(125,074	)
	Total deferred tax liabilities	$	(155,855	)		$	(132,177	)
Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
	Balance at January 1, 2013	$	783
	Additions for tax positions taken in prior years		17
	Reductions for tax positions taken in prior years		(184	)
	Reductions as a result of a lapse of the applicable statute of limitations		(157	)
	Balance at December 31, 2013	$	459
	Additions for tax positions taken in prior years		231
	Additions for tax positions related to the current year		587
	Reductions as a result of a lapse of the applicable statute of limitations		(212	)
	Balance at December 31, 2014	$	1,065

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment consist of the following (in thousands):
		December 31,
		2014			2013
	Land	$	9,855		$	9,855
	Building and improvements		35,212			35,212
	Leasehold improvements		4,241			4,245
	Computer equipment and software		70,719			74,751
	Furniture and equipment		12,931			12,729
	Transportation equipment		346,055			236,900
			479,013			373,692
	Less:  Accumulated depreciation and amortization		(140,686	)		(113,292	)
	Property and Equipment, net	$	338,327		$	260,400

LongTerm_Debt_and_Financing_Ar1

Long-Term Debt and Financing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Outstanding Debt	Our outstanding debt is as follows (in thousands):
		Period Ended
		December 31,			December 31,
		2014			2013
	Secured Equipment Notes due in December 2019 with monthly principal and interest payments of $0.2 million commencing in January 2015; interest is paid monthly at a fixed annual rate of 2.24%	$	13,387		$	-
	Secured Equipment Notes due in November 2019 with monthly principal and interest payments of $0.5 million commencing in December 2014; interest is paid monthly at a fixed annual rate of 2.05%		28,429			-
	Secured Equipment Notes due in September 2019 with monthly principal and interest payments of $0.4 million commencing in September 2014; interest is paid monthly at a fixed annual rate of 2.15%		22,772			-
	Secured Equipment Notes due in February 2019 with monthly principal and interest payments of $0.4 million commencing in January 2014; interest is paid monthly at a fixed annual rate between 1.87% and 1.93%		21,016			-
	Secured Equipment Notes due in June 2018 with quarterly principal and interest payments of $0.5 million commencing in August 2013; interest is paid quarterly at a fixed annual rate between 1.9% and 2.0%		6,475			8,246
			92,079			8,246
	Less current portion		(19,619	)		(1,771	)
	Total long-term debt	$	72,460		$	6,475
Summary of Aggregate Principal Payments	Aggregate principal payments, in thousands, due subsequent to December 31, 2014, are as follows:
	2015	$	19,619
	2016		20,023
	2017		20,209
	2018		19,668
	2019		12,560
		$	92,079

Leases_User_Charges_and_Commit1

Leases, User Charges and Commitments (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Future Payments Due	Future Payments Due:
					Operating
					Leases and
		Capital			Other
		Lease			Commitments		Total
	2015	$	3,179		$	9,686	$	12,865
	2016		3,188			7,476		10,664
	2017		3,179			5,676		8,855
	2018		3,179			3,926		7,105
	2019		3,179			2,820		5,999
	2020 and thereafter		5,037			7,361		12,398
		$	20,941		$	36,945	$	57,886
	Less: Imputed interest		(2,500	)
	Net capital lease liability	$	18,441

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Non-Vested Restricted Stock Activity	The following table summarizes the non-vested restricted stock activity for the year ended December 31, 2014:
				Weighted
				Average
				Grant Date
	Non-vested restricted stock	Shares		Fair Value
	Non-vested January 1, 2014	761,702		$	33.09
	Granted	293,910		$	39.66
	Vested	-236,015		$	32.01
	Forfeited	-90,927		$	35.39
	Non-vested at December 31, 2014	728,670		$	35.81
Schedule of Restricted Stock Granted	The following table summarizes the restricted stock granted during the respective years:
	Restricted stock grants	2014				2013		2012
	Employees		273,910				280,900		276,017
	Outside directors		20,000				20,000		20,000
	Total		293,910				300,900		296,017
	Weighted average grant date fair value	$	39.66			$	34.64	$	32.62
	Vesting period	3-5 years				3-5 years		3-5 years

Stock_Buy_Back_Plans_Tables

Stock Buy Back Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Number of Shares Purchased and Maximum Value of Shares That yet be Purchased Under Plan	The following table displays the number of shares purchased during 2014 and the maximum value of shares that may yet be purchased under the plan:
								Maximum Value of
		Total				Total Number of		Shares that May Yet
		Number of		Average		Shares Purchased as		Be Purchased Under
		Shares		Price Paid		Part of Publicly		the Plan
		Purchased		Per Share		Announced Plan		(in 000’s)
	October 22 to October 31		310,982	$	35.22		310,982	$	64,047
	November 1 to November 30		190,289	$	37.16		190,289	$	56,977
	December 1 to December 31		-	$	-		-	$	56,977
	Total		501,271	$	35.96		501,271	$	56,977

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Summary of Selected Quarterly Financial Data	The following table sets forth the selected quarterly financial data for each of the quarters in 2014 (in thousands, except per share amounts):
		Quarter Ended
		March 31,		June 30,		September 30,		December 31,
		2014		2014		2014		2014
	Year Ended December 31, 2014:
	Revenue	$	848,449	$	893,930	$	913,386	$	915,361
	Gross margin		88,744		98,585		93,196		89,910
	Operating income		20,496		30,927		7,677		24,777
	Net income		12,035		18,676		4,491		16,356
	Basic earnings per share	$	0.33	$	0.51	$	0.12	$	0.45
	Diluted earnings per share	$	0.33	$	0.51	$	0.12	$	0.45
	The following table sets forth the selected quarterly financial data for each of the quarters in 2013 (in thousands, except per share amounts):
		Quarter Ended
		March 31,		June 30,		September 30,		December 31,
		2013		2013		2013		2013
	Year Ended December 31, 2013:
	Revenue	$	768,980	$	836,685	$	882,981	$	885,252
	Gross margin		87,338		95,473		93,124		95,088
	Operating income		24,737		30,464		31,295		27,251
	Net income		15,364		18,610		18,600		16,536
	Basic earnings per share	$	0.42	$	0.5	$	0.5	$	0.45
	Diluted earnings per share	$	0.42	$	0.5	$	0.5	$	0.45

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
		Segment
Summary Of Significant Accounting Policies [Line Items]
Reporting business segments		2
Reserve for uncollectible accounts	$7,400,000	$7,000,000	$7,400,000
Goodwill impairment		0	0
Impairment of trade name	2,904,000		2,904,000
State tax net operating losses, valuation allowance		$100,000
Leasehold Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated life, description		The shorter of useful life or lease term.
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage		50.00%
Maximum [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Minimum percentage of revenue accounted for by one customer		10.00%	10.00%	10.00%
Maximum [Member] | Building And Improvement [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated life		40 years
Maximum [Member] | Computer Equipment and Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated life		5 years
Maximum [Member] | Furniture and Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated life		10 years
Maximum [Member] | Transportation Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated life		15 years
Maximum [Member] | Software Development [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets estimated useful life		5 years

Capital_Structure_Additional_I

Capital Structure - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Preferred stock, shares authorized	2,000,000	2,000,000
Class B Common Stock [Member]
Class of Stock [Line Items]
Common stock, rights to vote	80
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock, rights to vote	one

Reconciliation_of_Earnings_Per

Reconciliation of Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income for basic and diluted earnings per share	$16,356	$4,491	$18,676	$12,035	$16,536	$18,600	$18,610	$15,364	$51,558	$69,110	$67,953
Weighted average shares outstanding - basic									36,590	36,829	37,053
Dilutive effect of stock options and restricted stock									142	153	132
Weighted average shares outstanding - diluted									36,732	36,982	37,185
Earnings per share - basic	$0.45	$0.12	$0.51	$0.33	$0.45	$0.50	$0.50	$0.42	$1.41	$1.88	$1.83
Earnings per share - diluted	$0.45	$0.12	$0.51	$0.33	$0.45	$0.50	$0.50	$0.42	$1.40	$1.87	$1.83

Impairment_of_Software_Additio

Impairment of Software - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2014
Asset Impairment Charges [Abstract]
Software development cost	$11,900	$11,881

Business_Segments_Additional_I

Business Segments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
	Segment
Segment Reporting Information [Line Items]
Reporting business segments	2
Minimum [Member]
Segment Reporting Information [Line Items]
Number of railheads	1

Summary_of_Operating_Results_D

Summary of Operating Results (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenue	$915,361	$913,386	$893,930	$848,449	$885,252	$882,981	$836,685	$768,980	$3,571,126	$3,373,898	$3,124,108
Transportation costs									3,200,691	3,002,875	2,768,042
Gross margin	89,910	93,196	98,585	88,744	95,088	93,124	95,473	87,338	370,435	371,023	356,066
Costs and expenses:
Salaries and benefits									136,480	135,341	129,143
Agent fees and commissions									62,041	55,789	55,112
General and administrative									58,014	56,772	52,832
Depreciation and amortization									7,799	6,470	6,619
Driver settlements and related costs									10,343
Impairment of software		11,900							11,881
Impairment of trade name					2,904					2,904
Total costs and expenses									286,558	257,276	243,706
Operating income	24,777	7,677	30,927	20,496	27,251	31,295	30,464	24,737	83,877	113,747	112,360
Capital expenditures									119,171	110,917	56,882
Operating Segments [Member] | Hub [Member]
Segment Reporting Information [Line Items]
Revenue									2,722,799	2,599,763	2,392,289
Transportation costs									2,461,144	2,325,512	2,128,942
Gross margin									261,655	274,251	263,347
Costs and expenses:
Salaries and benefits									122,097	120,478	113,855
Agent fees and commissions									45	1,372	1,900
General and administrative									51,108	50,484	45,411
Depreciation and amortization									6,238	4,326	4,448
Driver settlements and related costs									10,343
Impairment of software									11,881
Impairment of trade name										2,904
Total costs and expenses									201,712	179,564	165,614
Operating income									59,943	94,687	97,733
Capital expenditures									118,640	109,412	54,266
Operating Segments [Member] | Mode [Member]
Segment Reporting Information [Line Items]
Revenue									931,131	823,159	779,928
Transportation costs									822,351	726,387	687,209
Gross margin									108,780	96,772	92,719
Costs and expenses:
Salaries and benefits									14,383	14,863	15,288
Agent fees and commissions									61,996	54,417	53,212
General and administrative									6,906	6,288	7,421
Depreciation and amortization									1,561	2,144	2,171
Total costs and expenses									84,846	77,712	78,092
Operating income									23,934	19,060	14,627
Capital expenditures									531	1,505	2,616
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Revenue									-82,804	-49,024	-48,109
Transportation costs									($82,804)	($49,024)	($48,109)

Schedule_of_Assets_Detail

Schedule of Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]
Total assets	$1,212,127	$1,047,943
Goodwill	262,813	263,032	263,251
Hub [Member]
Segment Reporting Information [Line Items]
Goodwill	233,424	233,643	233,862
Mode [Member]
Segment Reporting Information [Line Items]
Goodwill	29,389	29,389	29,389
Operating Segments [Member] | Hub [Member]
Segment Reporting Information [Line Items]
Total assets	1,030,722	887,848
Goodwill	233,424	233,643
Operating Segments [Member] | Mode [Member]
Segment Reporting Information [Line Items]
Total assets	189,787	164,071
Goodwill	29,389	29,389
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Total assets	($8,382)	($3,976)

Summary_of_Revenue_by_Segment_

Summary of Revenue by Segment and Business Line (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenue	$915,361	$913,386	$893,930	$848,449	$885,252	$882,981	$836,685	$768,980	$3,571,126	$3,373,898	$3,124,108
Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue									2,203,295	2,160,947	2,042,286
Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue									673,231	643,504	651,116
Logistics [Member]
Segment Reporting Information [Line Items]
Revenue									694,600	569,447	430,706
Operating Segments [Member] | Hub [Member]
Segment Reporting Information [Line Items]
Revenue									2,722,799	2,599,763	2,392,289
Operating Segments [Member] | Hub [Member] | Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue									1,815,842	1,818,162	1,731,487
Operating Segments [Member] | Hub [Member] | Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue									338,590	333,027	335,213
Operating Segments [Member] | Hub [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Revenue									568,367	448,574	325,589
Operating Segments [Member] | Mode [Member]
Segment Reporting Information [Line Items]
Revenue									931,131	823,159	779,928
Operating Segments [Member] | Mode [Member] | Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue									466,859	389,186	354,662
Operating Segments [Member] | Mode [Member] | Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue									335,587	311,930	318,848
Operating Segments [Member] | Mode [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Revenue									128,685	122,043	106,418
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Revenue									-82,804	-49,024	-48,109
Intersegment Elims [Member] | Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue									-79,406	-46,401	-43,863
Intersegment Elims [Member] | Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue									-946	-1,453	-2,945
Intersegment Elims [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Revenue									($2,452)	($1,170)	($1,301)

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Intangible Assets [Line Items]
Goodwill impairment		$0	$0
Goodwill accumulated impairment loss		0
Impairment of trade name	2,904,000		2,904,000
Intangible assets, Amortization expense		$1,300,000	$1,400,000	$1,600,000
Hub [Member] | Weighted Average [Member]
Intangible Assets [Line Items]
Weighted average life of definite lived intangible assets		5 years 5 months 1 day
Mode [Member] | Weighted Average [Member]
Intangible Assets [Line Items]
Weighted average life of definite lived intangible assets		14 years 3 months

Carrying_Amount_of_Goodwill_De

Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill, Beginning Balance	$263,032	$263,251
Other	-219	-219
Goodwill, Ending Balance	262,813	263,032
Hub [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	233,643	233,862
Other	-219	-219
Goodwill, Ending Balance	233,424	233,643
Mode [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	29,389	29,389
Other	0	0
Goodwill, Ending Balance	$29,389	$29,389

Components_of_Other_Intangible

Components of Other Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Intangible Assets [Line Items]
Intangible Assets, Gross Amount	25,146	25,146
Finite-lived intangible assets, Accumulated Amortization	-7,808	-6,513
Indefinite-lived intangible assets, Accumulated Impairment Loss	-2,904	-2,904
Intangible Assets, Net Carrying Value	14,434	15,729
Hub [Member]
Other Intangible Assets [Line Items]
Intangible Assets, Gross Amount	9,784	9,784
Finite-lived intangible assets, Accumulated Amortization	-4,608	-4,166
Indefinite-lived intangible assets, Accumulated Impairment Loss	-2,904	-2,904
Intangible Assets, Net Carrying Value	2,272	2,714
Hub [Member] | Trade Names [Member]
Other Intangible Assets [Line Items]
Indefinite-lived intangible assets, Gross Amount	2,904	2,904
Indefinite-lived intangible assets, Accumulated Impairment Loss	-2,904	-2,904
Indefinite-lived intangible assets, Net Carrying Value	0	0
Hub [Member] | Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	5,181	5,181
Finite-lived intangible assets, Accumulated Amortization	-2,909	-2,467
Finite-lived intangible assets, Net Carrying Value	2,272	2,714
Hub [Member] | Customer Relationships [Member] | Minimum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	7 years	7 years
Hub [Member] | Customer Relationships [Member] | Maximum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	15 years	15 years
Hub [Member] | Relationships With Owner Operators [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	1,179	1,179
Finite-lived intangible assets, Accumulated Amortization	-1,179	-1,179
Finite-lived intangible assets, Net Carrying Value	0	0
Hub [Member] | Relationships With Owner Operators [Member] | Minimum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	2 years	2 years
Hub [Member] | Relationships With Owner Operators [Member] | Maximum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	6 years	6 years
Hub [Member] | Information Technology [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	500	500
Finite-lived intangible assets, Accumulated Amortization	-500	-500
Finite-lived intangible assets, Net Carrying Value	0	0
Intangible assets estimated useful life	6 years	6 years
Hub [Member] | Backlog/open orders [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	20	20
Finite-lived intangible assets, Accumulated Amortization	-20	-20
Finite-lived intangible assets, Net Carrying Value	0	0
Intangible assets estimated useful life	1 month	1 month
Mode [Member] | Agency/Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	15,362	15,362
Finite-lived intangible assets, Accumulated Amortization	-3,200	-2,347
Finite-lived intangible assets, Net Carrying Value	12,162	13,015
Intangible assets estimated useful life	18 years	18 years

Amortization_Expense_Detail

Amortization Expense (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Finite Lived Intangible Assets [Line Items]
2015	$1,295
2016	1,295
2017	1,295
2018	1,248
2019	1,108
Hub [Member]
Finite Lived Intangible Assets [Line Items]
2015	442
2016	442
2017	442
2018	395
2019	255
Mode [Member]
Finite Lived Intangible Assets [Line Items]
2015	853
2016	853
2017	853
2018	853
2019	$853

Reconciliation_of_Effective_Ta

Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	2.90%	3.20%	2.90%
State incentives	-0.80%	-0.60%
State law changes	-0.90%	0.10%	0.30%
Nondeductible expenses	0.90%	0.80%	0.50%
Other	-0.10%	0.10%	0.20%
Net effective rate	37.00%	38.60%	38.90%

Summary_of_Provision_for_Incom

Summary of Provision for Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$5,939	$22,880	$30,375
State and local	445	3,817	4,331
Foreign	249	205	47
Current income tax expense, total	6,633	26,902	34,753
Deferred
Federal	23,600	15,920	7,865
State and local	191	627	693
Foreign	-115	-4	-7
Deferred income tax expense, total	23,676	16,543	8,551
Total provision	$30,309	$43,445	$43,304

Summary_of_Deferred_Tax_Assets

Summary of Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Reserve for uncollectible accounts receivable	$2,101	$2,398
Accrued compensation	7,161	8,175
Other reserves	2,036	2,356
Current deferred tax assets	11,298	12,929
Accrued compensation	6,829	5,919
Other reserves	764	545
Operating loss carryforwards	1,387	883
Less valuation allowance	-108	-108
Non-current deferred tax assets	8,872	7,239
Total deferred tax assets	20,170	20,168
Prepaids	-1,551	-2,473
Other receivables	-4,931	-4,630
Current deferred tax liabilities	-6,482	-7,103
Property and equipment	-67,726	-45,185
Goodwill	-81,647	-79,889
Non-current deferred tax liabilities	-149,373	-125,074
Total deferred tax liabilities	($155,855)	($132,177)

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Operating loss carryforwards	$1,387,000	$883,000
Valuation allowance for state tax net operating losses	108,000	108,000
Unrecognized tax benefits	1,065,000	459,000	783,000
Potential increase (decrease) in income tax provision	700,000	300,000
Possible reduction in unrecognized tax benefits resulting from audit settlements	300,000
Possible increase in unrecognized tax benefits resulting from audit settlements	-300,000
Interest expense related to income tax liabilities	1,000
Income tax penalties related to income tax liabilities	1,000
Proceeds from audited refund claim for tax	$300,000
Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	31-Dec-15
Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	31-Dec-34

Unrecognized_Tax_Benefits_Deta

Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Beginning Balance	$459	$783
Additions for tax positions taken in prior years	231	17
Reductions for tax positions taken in prior years		-184
Additions for tax positions related to the current year	587
Reductions as a result of a lapse of the applicable statute of limitations	-212	-157
Ending Balance	$1,065	$459

Fair_Value_Measurement_Additio

Fair Value Measurement - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Restricted investments	$21.90	$20.80

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$479,013	$373,692
Less: Accumulated depreciation and amortization	-140,686	-113,292
Property and Equipment, net	338,327	260,400
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	9,855	9,855
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	35,212	35,212
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	4,241	4,245
Computer equipment and software [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	70,719	74,751
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	12,931	12,729
Transportation equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$346,055	$236,900

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$479,013,000	$373,692,000
Equipment, capital lease obligation				26,400,000
Equipment, capital lease obligation, net	17,400,000	20,000,000
Depreciation and amortization expense related to property and equipment	28,300,000	20,200,000	19,600,000
Amortization expense under capital lease obligation	2,600,000	2,600,000	2,600,000
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$346,055,000	$236,900,000

LongTerm_Debt_and_Financing_Ar2

Long-Term Debt and Financing Arrangements - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
				Chassis
Debt Instrument [Line Items]
Maximum unsecured borrowing capacity		$50,000,000
Line of credit, expiration date	31-Dec-18
Number of chassis leased				3,126
Chassis, lease agreement period (years)				10 years
Capital lease interest paid	800,000	900,000	1,000,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Outstanding letters of credit	6,100,000
Letters of credit expiration, years	2015
Revolving Line of Credit Facility [Member]
Debt Instrument [Line Items]
Unused and available borrowings under bank revolving line of credit	$43,900,000	$44,800,000
Minimum [Member]
Debt Instrument [Line Items]
Commitment fee charged on the unused line of credit		0.10%
Interest coverage ratio		2.00%
Maximum [Member]
Debt Instrument [Line Items]
Commitment fee charged on the unused line of credit		0.25%
Total leverage ratio		3.00%
LIBOR rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate under the Credit Agreement		1.00%
LIBOR rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate under the Credit Agreement		1.75%
Prime Rate [Member]
Debt Instrument [Line Items]
Interest rate under the Credit Agreement		0.75%

Schedule_of_Outstanding_Debt_D

Schedule of Outstanding Debt (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]
Secured long-term debt	$92,079	$8,246
Less current portion	-19,619	-1,771
Total long-term debt	72,460	6,475
Secured Equipment Notes due in December 2019 [Member]
Debt Instrument [Line Items]
Equipment note	13,387
Secured Equipment Notes due in November 2019 [Member]
Debt Instrument [Line Items]
Equipment note	28,429
Secured Equipment Notes due in September 2019 [Member]
Debt Instrument [Line Items]
Equipment note	22,772
Secured Equipment Notes due in February 2019 [Member]
Debt Instrument [Line Items]
Equipment note	21,016
Secured Equipment Notes due in June 2018 [Member]
Debt Instrument [Line Items]
Equipment note	$6,475	$8,246

Schedule_of_Outstanding_Debt_P

Schedule of Outstanding Debt (Parenthetical) (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Secured Equipment Notes due in December 2019 [Member]
Debt Instrument [Line Items]
Equipment notes due	31-Dec-19
Monthly payments	$0.20
Equipment notes, date of first required payment	31-Jan-15
Interest rate secured debt	2.24%
Payment Frequency	Monthly
Secured Equipment Notes due in November 2019 [Member]
Debt Instrument [Line Items]
Equipment notes due	30-Nov-19
Monthly payments	0.5
Equipment notes, date of first required payment	31-Dec-14
Interest rate secured debt	2.05%
Payment Frequency	Monthly
Secured Equipment Notes due in September 2019 [Member]
Debt Instrument [Line Items]
Equipment notes due	30-Sep-19
Monthly payments	0.4
Equipment notes, date of first required payment	30-Sep-14
Interest rate secured debt	2.15%
Payment Frequency	Monthly
Secured Equipment Notes due in February 2019 [Member]
Debt Instrument [Line Items]
Equipment notes due	28-Feb-19
Monthly payments	0.4
Equipment notes, date of first required payment	31-Jan-14
Payment Frequency	Monthly
Lower interest rate paid at a fixed rate	1.87%
Upper interest rate paid at a fixed rate	1.93%
Secured Equipment Notes due in June 2018 [Member]
Debt Instrument [Line Items]
Equipment notes due	30-Jun-18	30-Jun-18
Monthly payments	$0.50	$0.50
Equipment notes, date of first required payment	31-Aug-13	31-Aug-13
Payment Frequency	Quarterly	Quarterly
Lower interest rate paid at a fixed rate	1.90%	1.90%
Upper interest rate paid at a fixed rate	2.00%	2.00%

Summary_of_Aggregate_Principal

Summary of Aggregate Principal Payments (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]
2015	$19,619
2016	20,023
2017	20,209
2018	19,668
2019	12,560
Secured long-term debt	$92,079	$8,246

Leases_User_Charges_and_Commit2

Leases, User Charges and Commitments - Future Payments Due (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Leases [Abstract]
Future Payments Due, Capital Lease, 2015	$3,179
Future Payments Due, Capital Lease, 2016	3,188
Future Payments Due, Capital Lease, 2017	3,179
Future Payments Due, Capital Lease, 2018	3,179
Future Payments Due, Capital Lease, 2019	3,179
Future Payments Due, Capital Lease, 2020 and thereafter	5,037
Future Payments Due, Capital Lease, Total	20,941
Less: Imputed interest	-2,500
Net capital lease liability	18,441
Future Payments Due, Operating Leases and Other Commitments, 2015	9,686
Future Payments Due, Operating Leases and Other Commitments, 2016	7,476
Future Payments Due, Operating Leases and Other Commitments, 2017	5,676
Future Payments Due, Operating Leases and Other Commitments, 2018	3,926
Future Payments Due, Operating Leases and Other Commitments, 2019	2,820
Future Payments Due, Operating Leases and Other Commitments, 2020 and thereafter	7,361
Future Payments Due, Operating Leases and Other Commitments, Total	36,945
Future Payments Due, Total Leases, 2015	12,865
Future Payments Due, Total Leases, 2016	10,664
Future Payments Due, Total Leases, 2017	8,855
Future Payments Due, Total Leases, 2018	7,105
Future Payments Due, Total Leases, 2019	5,999
Future Payments Due, Total Leases, 2020 and thereafter	12,398
Future Payments Due, Leases, Total	$57,886

Leases_User_Charges_and_Commit3

Leases, User Charges and Commitments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Lease and Rental Expense [Line Items]
Rental expense	$8,100,000	$10,100,000	$8,800,000
Rail transportation charges	67,800,000	69,100,000	67,000,000
Minimum commitments on rail owned chassis and containers	0
Transportation Costs [Member]
Lease and Rental Expense [Line Items]
Rental expense	$13,100,000	$10,200,000	$9,300,000

Guarantees_Additional_Informat

Guarantees - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Guarantees [Abstract]
Expiration dates of guarantees	2020
Potential maximum exposure under these lease guarantees	$27.20	$39
Liability representing fair value for estimated defaults of guarantees, based on discounted cash-flow analysis	$0.30	$0.70

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2014	Dec. 31, 2007	Dec. 31, 2003	Dec. 31, 1996	Dec. 31, 1997	Dec. 31, 1999	Dec. 31, 2002
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted since 2003	0
Stock options outstanding	0
Shares available for future grant	726,640
Compensation expense related to share-based compensation plans	$8,258,000	$7,667,000	$6,539,000
Compensation expense related to share-based compensation plans, net of tax	5,200,000	4,600,000	4,000,000
Total intrinsic value of options exercised	0	600,000	1,200,000
Proceeds from stock options exercised	0	41,000	69,000
Tax benefit from stock options exercised	0	200,000	500,000
Unrecognized compensation cost weighted average period recognized (years)	2 years 9 months 7 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of restricted shares vested	9,400,000	7,500,000	5,400,000
Unrecognized compensation cost related to non-vested share-based compensation	$19,000,000
Restricted stock grants	293,910	300,900	296,017
Restricted stock grants, Weighted average grant date fair value	$39.66	$34.64	$32.62	$37.31
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	3 years
Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	3 years	3 years	3 years	3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	5 years
Maximum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	5 years	5 years	5 years	5 years
1996 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved under long-term incentive plan							1,800,000
1997 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved under long-term incentive plan								600,000
1999 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved under long-term incentive plan									2,400,000
Two Thousand Two Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved under long-term incentive plan										2,400,000
Stock reserved under long-term incentive plan, number of additional shares distributed					1,000,000	2,000,000
Employees [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants				252,869
Outside Directors [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants				22,000

StockBased_Compensation_Plans_2

Stock-Based Compensation Plans - Schedule of Non-Vested Restricted Stock Activity (Detail) (Restricted Stock [Member], USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Non-vested, Beginning balance	761,702	761,702
Shares, Granted		293,910	300,900	296,017
Shares, Vested		-236,015
Shares, Forfeited		-90,927
Shares Non-vested, Ending balance		728,670	761,702
Weighted average grant date fair value Non-vested, Beginning balance	$33.09	$33.09
Weighted average grant date fair value, Granted	$37.31	$39.66	$34.64	$32.62
Weighted average grant date fair value, Vested		$32.01
Weighted average grant date fair value, Forfeited		$35.39
Weighted average grant date fair value Non-vested, Ending balance		$35.81	$33.09

StockBased_Compensation_Plans_3

Stock-Based Compensation Plans - Restricted Stock Granted (Detail) (USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period, Years		3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period, Years		5 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants		293,910	300,900	296,017
Restricted stock grants, Weighted average grant date fair value	$37.31	$39.66	$34.64	$32.62
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period, Years	3 years	3 years	3 years	3 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period, Years	5 years	5 years	5 years	5 years
Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants		273,910	280,900	276,017
Restricted Stock [Member] | Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants		20,000	20,000	20,000

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Expenses related to employer contributions	$1.90	$1.80	$1.60
Expenses related to deferred compensation plan	0.3	0.4	0.3
Deferred compensation liability	$22.40	$21.50
Nonqualified Deferred Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percent match by employer on the first 6% of employee compensation	50.00%
Maximum percent of compensation employer will match	3.00%

Legal_Matters_Additional_Infor

Legal Matters - Additional Information (Detail) (Robles and Barillas lawsuits [Member], USD $)	3 Months Ended	0 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Feb. 11, 2015
Legal Settlement By Party [Line Items]
Settlement charges for individual drivers	$9.30
Legal , communication and implementation charges	$1
Subsequent Event [Member]
Legal Settlement By Party [Line Items]
Percentage of accepted settlement offer		92.00%

Stock_Buy_Back_Plans_Additiona

Stock Buy Back Plans - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended
	Oct. 31, 2014	Nov. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 22, 2014	Nov. 30, 2012
Equity Class Of Treasury Stock [Line Items]
Purchase of treasury shares (in shares)	310,982	190,289	501,271
Purchase of treasury shares			$18,024,000	$13,791,000	$11,208,000
Class A Common Stock [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						75,000,000	25,000,000
Purchase of treasury shares (in shares)			501,271	377,906
Class A Common Stock [Member] | Employee Restricted Stock Plan [Member]
Equity Class Of Treasury Stock [Line Items]
Stock tendered for payments of withholding taxes (in shares)			80,772	75,995
Purchase of treasury shares			$3,200,000	$2,600,000

Stock_Buy_Back_Plans_Number_of

Stock Buy Back Plans - Number of Shares Purchased and Maximum Value of Shares That yet be Purchased Under Plan (Detail) (USD $)	0 Months Ended	1 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Oct. 31, 2014	Nov. 30, 2014	Dec. 31, 2014
Equity [Abstract]
Total Number of Shares Purchased	310,982	190,289	501,271
Average Price Paid Per Share	$35.22	$37.16	$35.96
Total Number of Shares Purchased as Part of Publicly Announced Plan	310,982	190,289	501,271
Maximum Value of Shares that May Yet Be Purchased Under the Plan	$64,047	$56,977	$56,977

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenue	$915,361	$913,386	$893,930	$848,449	$885,252	$882,981	$836,685	$768,980	$3,571,126	$3,373,898	$3,124,108
Gross margin	89,910	93,196	98,585	88,744	95,088	93,124	95,473	87,338	370,435	371,023	356,066
Operating income	24,777	7,677	30,927	20,496	27,251	31,295	30,464	24,737	83,877	113,747	112,360
Net income	$16,356	$4,491	$18,676	$12,035	$16,536	$18,600	$18,610	$15,364	$51,558	$69,110	$67,953
Basic earnings per share	$0.45	$0.12	$0.51	$0.33	$0.45	$0.50	$0.50	$0.42	$1.41	$1.88	$1.83
Diluted earnings per share	$0.45	$0.12	$0.51	$0.33	$0.45	$0.50	$0.50	$0.42	$1.40	$1.87	$1.83

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)	1 Months Ended
	Jan. 31, 2015
Tractors [Member]
Subsequent Event [Line Items]
Secured debt	$2,200,000
Term of secured debt	5 years
Interest rate secured debt	2.26%
Containers [Member]
Subsequent Event [Line Items]
Secured debt	7,000,000
Term of secured debt	5 years
Interest rate secured debt	1.72%
Tractors and Containers [Members]
Subsequent Event [Line Items]
Monthly payments	$200,000
Monthly payments beginning period	2015-02

Recovered_Sheet1

Valuation and Qualifying Accounts (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance for Uncollectible Trade Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$7,446,000		$6,689,000		$7,730,000
Charged to Costs & Expenses	129,000		662,000		208,000
Charged to Other Accounts	-565,000	[1]	142,000	[1]	-623,000	[1]
Deductions	-20,000	[2]	-47,000	[2]	-626,000	[2]
Balance at End of Year	6,990,000		7,446,000		6,689,000
Deferred tax valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	108,000		122,000		108,000
Charged to Costs & Expenses	0		-14,000		14,000
Balance at End of Year	$108,000		$108,000		$122,000
[1]	Expected customer account adjustments charged to revenue and write-offs, net of recoveries
[2]	Represents bad debt recoveries