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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 27, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	HUBG
Entity Registrant Name	Hub Group, Inc.
Entity Central Index Key	0000940942
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		33,719,269
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		662,296

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 26,753	$ 28,557
Accounts receivable trade, net	615,690	583,994
Accounts receivable other	3,851	5,722
Prepaid taxes	5,268	12,088
Prepaid expenses and other current assets	15,763	25,697
TOTAL CURRENT ASSETS	667,325	656,058
Restricted investments	24,107	24,181
Property and equipment, net	618,931	562,150
Other intangibles, net	71,501	74,348
Goodwill, net	348,106	348,661
Other assets	3,534	5,543
TOTAL ASSETS	1,733,504	1,670,941
CURRENT LIABILITIES:
Accounts payable trade	348,222	338,933
Accounts payable other	12,418	12,268
Accrued payroll	36,487	28,994
Accrued other	78,598	59,305
Current portion of capital lease	2,794	2,777
Current portion of long term debt	86,740	77,266
TOTAL CURRENT LIABILITIES	565,259	519,543
Long term debt	179,444	214,808
Non-current liabilities	39,083	37,927
Long term portion of capital lease	6,196	7,696
Deferred taxes	132,463	121,095
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2018 and 2017
Additional paid-in capital	168,614	173,011
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	(15,458)	(15,458)
Retained earnings	908,934	870,716
Accumulated other comprehensive loss	(190)	(194)
Treasury stock; at cost, 7,507,623 shares in 2018 and 7,777,722 shares in 2017	(251,260)	(258,622)
TOTAL STOCKHOLDERS' EQUITY	811,059	769,872
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,733,504	1,670,941
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 (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
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	7,507,623	7,777,722
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	33,717,169	33,447,070
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

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 1,179,093	$ 923,596	$ 2,275,064	$ 1,816,352
Transportation costs	1,042,903	822,279	2,016,083	1,613,450
Gross margin	136,190	101,317	258,981	202,902
Costs and expenses:
Salaries and benefits	58,092	45,038	114,099	88,217
Agent fees and commissions	21,969	17,038	41,111	35,031
General and administrative	20,216	20,114	40,720	40,938
Depreciation and amortization	3,960	2,549	7,965	4,961
Total costs and expenses	104,237	84,739	203,895	169,147
Operating income	31,953	16,578	55,086	33,755
Other income (expense):
Interest expense	(2,187)	(1,032)	(4,291)	(2,130)
Interest and dividend income	22	200	44	330
Other, net	(189)		(244)	194
Total other expense	(2,354)	(832)	(4,491)	(1,606)
Income before provision for income taxes	29,599	15,746	50,595	32,149
Provision for income taxes	7,548	6,204	12,377	12,273
Net income	22,051	9,542	38,218	19,876
Other comprehensive income:
Foreign currency translation adjustments	(25)	28	4	92
Total comprehensive income	$ 22,026	$ 9,570	$ 38,222	$ 19,968
Basic earnings per common share	$ 0.66	$ 0.29	$ 1.14	$ 0.60
Diluted earnings per common share	$ 0.66	$ 0.29	$ 1.14	$ 0.60
Basic weighted average number of shares outstanding	33,389	33,220	33,382	33,213
Diluted weighted average number of shares outstanding	33,562	33,262	33,520	33,318

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net Income	$ 38,218	$ 19,876
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	38,251	25,288
Deferred taxes	11,767	7,713
Compensation expense related to share-based compensation plans	6,982	4,972
Contingent consideration adjustment	(3,571)
(Gain) loss on sale of assets	(90)	307
Changes in operating assets and liabilities:
Restricted investments	74	(2,408)
Accounts receivable, net	(29,748)	26,240
Prepaid taxes	6,820	(3,352)
Prepaid expenses and other current assets	9,935	4,493
Other assets	1,869	(2,653)
Accounts payable	9,878	307
Accrued expenses	4,857	(18,013)
Non-current liabilities	2,382	368
Net cash provided by operating activities	97,624	63,138
Cash flows from investing activities:
Proceeds from sale of equipment	1,234	2,356
Purchases of property and equipment	(69,261)	(29,593)
Net cash used in investing activities	(68,027)	(27,237)
Cash flows from financing activities:
Proceeds from issuance of debt	58,161	16,149
Repayments of long term debt	(84,051)	(23,118)
Stock tendered for payments of withholding taxes	(4,017)	(3,293)
Capital lease payments	(1,483)	(1,399)
Net cash used in financing activities	(31,390)	(11,661)
Effect of exchange rate changes on cash and cash equivalents	(11)	95
Net (decrease) increase in cash and cash equivalents	(1,804)	24,335
Cash and cash equivalents beginning of the period	28,557	127,404
Cash and cash equivalents end of the period	26,753	151,739
Supplemental disclosures of cash paid for:
Interest	4,182	2,176
Income taxes	$ 752	$ 10,743

Interim Financial Statements

6 Months Ended

Jun. 30, 2018

Quarterly Financial Information Disclosure [Abstract]

Interim Financial Statements

NOTE 1.

Interim Financial Statements

Our accompanying unaudited consolidated financial statements of Hub Group, Inc. (“we”, “us”, “our” or “Company”) have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in annual financial statements have been omitted pursuant to those rules and regulations. However, we believe that the disclosures contained herein are adequate to make the information presented not misleading.

The financial statements reflect, in our opinion, all material adjustments (which include only normal recurring adjustments) necessary to fairly present our financial position as of June 30, 2018 and results of operations for the six months ended June 30, 2018 and 2017. Certain amounts in prior periods have been reclassified to conform with current period presentation.

These unaudited consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017. Results of operations in interim periods are not necessarily indicative of results to be expected for a full year due partially to seasonality.

Accounting Standards Update. On January 1, 2018 we adopted the Accounting Standards Codification (ASC) topic 606, Revenue from Contracts with Customers. Under this new standard our significant accounting policy for revenue is as follows:

Revenue: 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. We generally recognize revenue over time because of continuous transfer of control to the customer. Since control is transferred over time, revenue and related transportation costs are recognized based on relative transit time, which is based on the extent of progress towards completion of the related performance obligation. We enter into contracts that can include various combinations of services, which are capable of being distinct and accounted for as separate performance obligations. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. 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. Service 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. These factors, discretion in setting prices and discretion in selecting vendors, further support reporting revenue on a gross basis for most of our revenue.

The Company capitalizes commissions incurred in connection with obtaining a contract. The Company capitalized commissions associated with dedicated services of $0.4 million at June 30, 2018. Capitalized commission fees are amortized based on the transfer of services to which the assets relate and are included in selling, general and administrative expenses. In 2018, the amount of amortization was approximately $30,000.

Costs incurred to fulfill an intermodal, truck brokerage or logistics contract are expensed as incurred according to the practical expedient that allows contract acquisition costs to be recognized immediately if the deferral period is one year or less.

The Company applied Topic 606 retrospectively using the practical expedient in paragraph 606-10-65-1(f)(3), under which the Company does not disclose the amount of consideration allocated to the remaining performance obligations or an explanation of when the Company expects to recognize that amount as revenue for all reporting periods presented before January 1, 2018. We do not generally have a remaining performance obligation due to revenue generally being recognized using relevant transit time. We only had one significant accounting policy change that is disclosed below.

Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by Hub Group from a customer were previously recorded on a gross basis. Under Topic 606, these taxes are excluded from revenue. This change had an effect of $0.9 million and $1.6 million on revenue and transportation costs for the three and six months ending June 30, 2017, respectively.

Acquisition

6 Months Ended

Jun. 30, 2018

Business Combinations [Abstract]

Acquisition

NOTE 2.

Acquisition

Hub Group Trucking (HGT), a wholly owned subsidiary of Hub Group, Inc., acquired all of the outstanding equity interests of Estenson Logistics, LLC (“Estenson”) on July 1, 2017 (the “Estenson Acquisition”). Estenson is now our wholly owned subsidiary, operating under the name Hub Group Dedicated (“HGD”). As a result of the Estenson Acquisition, HGT acquired substantially all of the assets of Estenson, which include tractors and trailers, as well as assumed certain liabilities, including equipment debt. HGD is included in the Hub segment.

The following unaudited pro forma consolidated results of operations for 2017 assume that the acquisition of Estenson was completed as of January 1, 2017 (in thousands, except for per share amounts):

	Three Months		Six Months
	Ended		Ended
	June 30, 2017		June 30, 2017
Revenue	$	983,029	$	1,930,373
Net income	$	12,450	$	24,053
Earnings per share
Basic	$	0.38	$	0.73
Diluted	$	0.38	$	0.72

The unaudited pro forma consolidated results for the three and six month periods were prepared using the acquisition method of accounting and are based on the historical financial information of Hub Group and HGD. The historical financial information has been adjusted to give effect to the pro forma adjustments that are: (i) directly attributable to the acquisition, (ii) factually supportable and (iii) expected to have a continuing impact on the combined results. The unaudited pro forma consolidated results are not necessarily indicative of what our consolidated results of operations actually would have been had we completed the acquisition on January 1, 2017.

Business Segments

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Business Segments

NOTE 3.

Business Segments

We report two distinct business segments. The first segment is Mode, which includes the Mode Transportation, LLC (“Mode LLC”) business only. The second segment is Hub, which is all business other than Mode.

Hub offers comprehensive multimodal solutions including intermodal, truck brokerage, logistics and dedicated services. Our employees operate the freight through a network of operating centers and terminals 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 LLC has Independent Business Owners (“IBOs”) who sell and operate the business throughout North America, as well as sales only agents. Mode LLC also has a corporate offices in Dallas, TX, a temperature protected services division, Temstar, located in Oak Brook, IL and a corporate office in Memphis, TN.

Mode LLC markets and operates its freight transportation services, consisting of intermodal, truck brokerage and logistics, primarily through agents who enter into contractual arrangements with Mode LLC.

Our transportation services for both Hub and Mode segments can be broadly placed into the following categories:

Intermodal. As an intermodal provider, we arrange for the movement of our customers’ freight in containers and trailers, typically over long distances of 750 miles or more. We contract with railroads to provide transportation for the long-haul portion of the shipment and with local trucking companies, known as “drayage companies,” for pickup and delivery. As part of our intermodal services, we negotiate rail and drayage rates, electronically track shipments in transit, consolidate billing and handle claims for freight loss or damage on behalf of our customers.

Truck Brokerage (Highway Services). We are one of the largest truck brokers in the United States, providing customers with a highway service option for their transportation needs. We match the customers’ needs with carriers’ capacity to provide the most effective service and price combination. We have contracts with a substantial base of carriers allowing us to meet the varied needs of our customers. As part of the truck brokerage services, we negotiate rates, track shipments in transit and handle claims for freight loss and damage on behalf of our customers.

Logistics and Other Services. Hub’s logistics business operates under the name of Unyson Logistics. Unyson Logistics is comprised of a network of logistics professionals dedicated to developing, implementing and operating customized logistics solutions for customers. Unyson Logistics offers a wide range of transportation management services and technology solutions including shipment optimization, load consolidation, mode selection, carrier management, load planning and execution and web-based shipment visibility. Unyson Logistics operates throughout North America, providing services through its main operating location in St. Louis with additional support locations in the Boston and Chicago metro areas. In addition, certain Mode LLC agents also provide logistics services. Our multi-modal transportation capabilities for both the Hub and Mode segments include small parcel, heavyweight, expedited, less-than-truckload, truckload, intermodal, railcar and international shipping.

Dedicated: Our dedicated service line, HGD, contracts with customers who wish to outsource a portion of their transportation needs. We offer a dedicated fleet of equipment and drivers to each customer, as well as the management and infrastructure to operate according to the customer’s high service expectations.

The following is a summary of operating results and certain other financial data for our business segments (in thousands):

	Three Months									Three Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Revenue	$	888,238	$	314,078	$	(23,223	)	$	1,179,093	$	704,344	$	242,998	$	(23,746	)	$	923,596
Transportation costs		788,087		278,039		(23,223	)		1,042,903		631,787		214,238		(23,746	)		822,279
Gross margin		100,151		36,039		-			136,190		72,557		28,760		-			101,317

Costs and expenses:
Salaries and benefits		53,839		4,253		-			58,092		41,569		3,469		-			45,038
Agent fees and commissions		11		21,958		-			21,969		14		17,024		-			17,038
General and administrative		17,768		2,448		-			20,216		18,331		1,783		-			20,114
Depreciation and amortization		3,719		241		-			3,960		2,249		300		-			2,549
Total costs and expenses		75,337		28,900		-			104,237		62,163		22,576		-			84,739

Operating income	$	24,814	$	7,139	$	-		$	31,953	$	10,395	$	6,184	$	-		$	16,578

Capital Expenditures	$	46,337	$	745	$	-		$	47,082	$	22,937	$	31	$	-		$	22,968

	Six Months									Six Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Revenue	$	1,719,823	$	601,977	$	(46,736	)	$	2,275,064	$	1,380,824	$	484,832	$	(49,304	)	$	1,816,352
Transportation costs		1,529,297		533,522		(46,736	)		2,016,083		1,236,462		426,292		(49,304	)		1,613,450
Gross margin		190,526		68,455		-			258,981		144,362		58,540		-			202,902

Costs and expenses:
Salaries and benefits		105,909		8,190		-			114,099		81,164		7,053		-			88,217
Agent fees and commissions		25		41,086		-			41,111		31		35,000		-			35,031
General and administrative		36,170		4,550		-			40,720		36,810		4,128		-			40,938
Depreciation and amortization		7,478		487		-			7,965		4,357		604		-			4,961
Total costs and expenses		149,582		54,313		-			203,895		122,362		46,785		-			169,147

Operating income	$	40,944	$	14,142	$	-		$	55,086	$	22,000	$	11,755	$	-		$	33,755

Capital Expenditures	$	67,874	$	1,387	$	-		$	69,261	$	29,562	$	31	$	-		$	29,593

	As of June 30, 2018									As of December 31, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Total assets	$	1,513,130	$	227,425	$	(7,051	)	$	1,733,504	$	1,470,792	$	210,088	$	(9,939	)	$	1,670,941
Goodwill	$	318,717	$	29,389	$	-		$	348,106	$	319,272	$	29,389	$	-		$	348,661

On January 1, 2018, the Company adopted ASC Topic 606 using the modified retrospective method applied to those contracts that were not completed as of January 1, 2018. Segment revenues were not significantly impacted under ASC Topic 606. The tables below represent disaggregated revenue from contracts with customers.

The following tables summarize our revenue by segment and business line (in thousands) for the quarter ended June 30:

	Three Months									Three Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Intermodal	$	526,028	$	141,221	$	(6,559	)	$	660,690	$	451,420	$	112,089	$	(12,866	)	$	550,643
Truck brokerage		114,936		103,168		(84	)		218,020		104,289		82,869		(310	)		186,848
Logistics		173,421		69,689		(16,580	)		226,530		148,635		48,040		(10,570	)		186,105
Dedicated		73,853		-		-			73,853		-		-		-			-
Total revenue	$	888,238	$	314,078	$	(23,223	)	$	1,179,093	$	704,344	$	242,998	$	(23,746	)	$	923,596

The following tables summarize our revenue by segment and business line (in thousands) for the six months ended June 30:

	Six Months									Six Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Intermodal	$	1,008,522	$	270,995	$	(17,829	)	$	1,261,688	$	875,843	$	234,269	$	(28,103	)	$	1,082,009
Truck brokerage		234,955		203,889		(442	)		438,402		210,473		161,031		(695	)		370,809
Logistics		342,098		127,093		(28,450	)		440,741		294,508		89,532		(20,506	)		363,534
Dedicated		134,248		-		(15	)		134,233		-		-		-			-
Total revenue	$	1,719,823	$	601,977	$	(46,736	)	$	2,275,064	$	1,380,824	$	484,832	$	(49,304	)	$	1,816,352

Earnings Per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 4.

Earnings Per Share

The following is a reconciliation of our earnings per share (in thousands, except for per share data):

	Three Months Ended, June 30,				Six Months Ended, June 30,
	2018		2017		2018		2017

Net income for basic and diluted earnings per share	$	22,051	$	9,542	$	38,218	$	19,876

Weighted average shares outstanding - basic		33,389		33,220		33,382		33,213

Dilutive effect of stock options and restricted stock		173		42		138		105

Weighted average shares outstanding - diluted		33,562		33,262		33,520		33,318

Earnings per share - basic	$	0.66	$	0.29	$	1.14	$	0.60

Earnings per share - diluted	$	0.66	$	0.29	$	1.14	$	0.60

Fair Value Measurement

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurement

NOTE 5.

Fair Value Measurement

The carrying value of cash, accounts receivable and accounts payable approximated fair value as of June 30, 2018 and December 31, 2017. At June 30, 2018 and December 31, 2017 the fair value of the Company’s fixed-rate borrowings was $3.6 million and $2.4 million less than the historical carrying value of $266.2 million and $247.1 million. The fair value of the fixed-rate borrowings was estimated using an income approach based on current interest rates available to the Company for borrowings on similar terms and maturities.

We consider as cash equivalents all highly liquid instruments with an original maturity of three months or less. As of June 30, 2018 and December 31, 2017, our cash and temporary investments were with high quality financial institutions in Demand Deposit Accounts (DDAs) and Savings Accounts.

Restricted investments, as of June 30, 2018 of $24.1 million and December 31, 2017 of $24.2 million, consisted of mutual funds which are reported at fair value and are related to the liabilities of our nonqualified deferred compensation plan.

The fair value of the contingent consideration related to the 2017 acquisition of Estenson was $1.1 million at June 30, 2018. This valuation was based on significant inputs that are not observable in the market, which are referred to as Level 3 inputs. Key assumptions include the likelihood of the acquired business achieving target levels of EBITDA using a probability-weighted expected return method (“PWERM”). The following table sets forth a reconciliation of changes in the fair value of the contingent consideration:

Balance at December 31, 2017	$	4,703
Change in fair value (1)		(3,571	)
Balance at June 30, 2018	$	1,132

(1)

We recorded an adjustment to the contingent consideration liability in the second quarter of 2018, resulting in an increase in income from operations. The income was recorded under “General and Administrative” in the Consolidated Statement of Income. The adjustment was the result of a change in the fair value of the contingent liability, which reflected two year EBITDA targets established prior to the close of the acquisition.

Our assets and liabilities measured at fair value are based on valuation techniques which consider prices and other relevant information generated by market transactions involving identical or comparable assets and liabilities. These valuation methods are based on either quoted market prices (Level 1) inputs, other than quoted prices in active markets, that are observable either directly or indirectly (Level 2), or unobservable inputs (Level 3). Cash, accounts receivable and accounts payable are defined as “Level 1”, long term debt is defined as “Level 2”, and the Estenson contingent consideration is defined as “Level 3” of the fair value hierarchy in the Fair Value Measurements and Disclosures Topic of the Codification.

- Definition

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

+ References + Details

Long-Term Debt and Financing Arrangements

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt and Financing Arrangements

NOTE 6.

Long-Term Debt and Financing Arrangements

At June 30, 2018, we were authorized to borrow up to $350 million under a revolving line of credit. As of June 30, 2018, we had no borrowings under our bank revolving line of credit and our unused and available borrowings were $327.0 million. As of December 31, 2017, we had $45.0 million of borrowings under our bank revolving line of credit and our unused and available borrowings were $284.9 million. We were in compliance with our debt covenants as of June 30, 2018.

We have standby letters of credit that expire at various dates in 2018 and 2019. As of June 30, 2018, our letters of credit were $23.0 million.

We have entered into various Equipment Notes (“Notes”) for the purchase of tractors, trailers and containers. The Notes are secured by the underlying equipment financed in the agreements.

	June 30,			December 31,
	2018			2017
	(in thousands except principal and interest payments)


Revolving line of credit	$	-		$	45,000

Secured Equipment Notes due on various dates in 2024 with monthly principal and interest payments between $403 and $83,000 commencing on various dates in 2017; interest is paid monthly at a fixed annual rate between 2.85% and 3.41%		12,691			13,586

Secured Equipment Notes due on various dates in 2023 with monthly principal and interest payments between $669 and $341,341 commencing on various dates in 2016, 2017 and 2018; interest is paid monthly at a fixed annual rate between 2.23% and 3.91%		91,077			36,981

Secured Equipment Notes due on various dates in 2022 with monthly principal and interest payments between $3,030 and $254,190 commencing on various dates from 2015 to 2017; interest is paid monthly at a fixed annual rate of between 2.16% and 2.87%		27,435			30,301

Secured Equipment Notes due on various dates in 2021 with monthly principal and interest payments between $1,940 and $352,655 commencing on various dates from 2014 to 2017; interest is paid monthly at a fixed annual rate between 2.04% and 2.96%		66,863			76,885

Secured Equipment Notes due on various dates in 2020 with monthly principal and interest payments between $3,614 and $398,496 commencing on various dates from 2013 to 2016; interest is paid monthly at a fixed annual rate between 1.72% and 2.78%		42,960			50,737

Secured Equipment Notes due on various dates in 2019 with monthly principal and interest payments between $1,594 and $325,050 commencing on various dates from 2013 to 2015; interest is paid monthly at a fixed annual rate between 1.79% and 2.62%		25,158			36,178

Secured Equipment Notes due on various dates in 2018 with monthly principal and interest payments between $6,480 and $163,428 commencing on various dates in 2013 and 2014; interest is paid monthly at a fixed annual rate between 2.05% and 2.7%		-			2,406

		266,184			292,074

Less current portion		(86,740	)		(77,266	)
Total long-term debt	$	179,444		$	214,808

Commitments and Contingencies

6 Months Ended

Jun. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 7.

Commitments and Contingencies

In November 2016, we committed to acquire 4,000 53’ containers, which were received by July 31, 2018. In the second quarter of 2018, we placed an order for 3,670 containers and we expect delivery between July 2018 and November 2018. We expect to finance these units with debt.

Since January 1, 2018 we have committed to acquire 869 tractors for $107.2 million. As of June 30, 2018 we received 380 tractors, which are being financed with debt, and we expect to receive the remaining 489 tractors from July to December of 2018. We expect to finance these tractors with debt.

Since January 1, 2018 we have committed to acquire 760 trailers for $24.2 million. As of June 30, 2018 we received 217 trailers, which will be financed with debt, and we expect to receive the remaining 543 trailers from July to December of 2018. We expect to finance these trailers with debt.

Legal Matters

6 Months Ended

Jun. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Legal Matters

NOTE 8.

Legal Matters

Robles

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 Hub Group Trucking, Inc (“HGT”). The action is brought on behalf of a class comprised of present and former California-based truck drivers for HGT who were classified as independent contractors, from January 2009 to August 2014. It alleges HGT has misclassified such drivers as independent contractors and that such drivers were employees. It asserts various violations of the California Labor Code and claims that HGT has engaged in unfair competition practices. The complaint seeks, among other things, declaratory and injunctive relief, monetary 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.

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, HGT decided to make settlement offers to individual drivers with respect to the claims alleged in this lawsuit, without admitting liability. As of June 30, 2018, 96% of the California drivers have accepted the settlement offers. In late 2014, HGT decided to convert its model from independent contractors to employee drivers in California (the “Conversion”). In early 2016, HGT closed its operations in Southern California.

On April 3, 2015, the Robles case was transferred to the U.S. District Court for the Western District of Tennessee (Western Division) in Memphis. In May 2015, the plaintiffs in the Robles case filed a Second Amended Complaint (“SAC”) which names 334 current and former Hub Group Trucking drivers as “interested putative class members.” In addition to reasserting their existing claims, the SAC includes claims post-Conversion, added two new plaintiffs and seeks a judicial declaration that the settlement agreements are unenforceable. In June 2015, Hub Group Trucking filed a motion to dismiss the SAC and on July 19, 2016, Hub Group Trucking’s motion to dismiss was granted in part, and denied in part, by the District Court. The motion to dismiss was granted for the claims of all purported class members who have signed settlement agreements and on plaintiffs’ claims based on quantum merit and it was denied with respect to federal preemption and choice of law. On August 11, 2016, Plaintiffs filed a motion to clarify whether the Court’s dismissal of the claims of all purported class members who signed settlement agreements was with or without prejudice and, if the dismissal was with prejudice, Plaintiffs moved the Court to revise and reconsider the order. On July 2, 2018, the Court denied the Plaintiffs’ Motion for Clarification or Reconsideration and stated that the dismissal of the claims of all purported class members who signed settlement agreements was with prejudice.

Adame

On August 5, 2015, the Plaintiffs’ law firm in the Robles case filed a lawsuit in state court in San Bernardino County, California on behalf of 63 named Plaintiffs against Hub Group Trucking and five Company employees. The lawsuit alleges claims similar to those being made in Robles and seeks monetary penalties under the Private Attorneys General Act. Of the 63 named Plaintiffs, at least 58 of them previously accepted the settlement offers referenced above.

On October 29, 2015, Defendants filed a notice of removal to move the case from state court in San Bernardino to federal court in the Central District of California. On November 19, 2015, Plaintiffs filed a motion to remand the case back to state court, claiming that the federal court lacks jurisdiction over the case because there is not complete diversity of citizenship between the parties and the amount in controversy threshold is not satisfied. The court granted Plaintiffs’ motion to remand to the state court in San Bernardino County on April 7, 2016.

On July 11, 2016, Defendants filed dismissal papers in state court, asking the court to dismiss Plaintiffs’ suit for various reasons, including that the agreement between HGT and its former California owner operators requires that this action be brought in Memphis, Tennessee, or stay the action pending the outcome of Robles. Defendants also asked the court to dismiss the individual defendants because PAGA’s language does not allow for individual liability. During a hearing on October 5, 2016, the judge issued an oral tentative ruling stating that the choice of forum provision was unenforceable. On February 17, 2017, with the stipulation of the parties, the Court entered an order dismissing, without prejudice, all of the individual Defendants and accepting the parties’ agreement that jurisdiction and venue are proper in the San Bernardino Superior Court and that Defendants will not seek to remove the case to federal district court. On April 12, 2017, the Court denied Defendant’s motion to dismiss based on insufficiency of the PAGA letter notice. On October 19, 2017, Plaintiffs filed an amended complaint, dismissing the previously named individuals as Defendants. On December 4, 2017, Defendants filed an Answer to Plaintiffs’ First Amended Complaint and a Memorandum of Points and Authorities in Support of their Motion for Judgment on the Pleadings arguing that judgement should be entered for Defendants because Plaintiffs’ claims are preempted by the Federal Truth-In-Leasing regulations. On January 31, 2018, a hearing was held on the motion to dismiss, and on February 1, 2018, the motion was denied. On March 27, 2018, Defendants filed a petition for a writ of mandate with the Court of Appeals. On June 12, 2018, the Court of Appeals denied the petition. On June 21, 2018, Defendants filed a petition for review with the California Supreme Court. There is no timetable for when the Supreme Court will decide if it will review the petition.

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 9. Income Taxes For the quarter ending June 30, 2018, the provision for income taxes increased to $7.5 million from $6.2 million in 2017, while the effective tax rate decreased to 25.5% in 2018 from 39.4% in 2017. For the six months ending June 30, 2018, the provision for income taxes increased to $12.4 million from $12.3 million in 2017, while the effective tax rate decreased to 24.5% from 38.2%. The provision for income taxes increased primarily due to higher pre-tax income in 2018, while the 2018 effective tax rate was lower primarily due to the enactment of the U.S. Tax Cuts and Jobs Act (the “Act”) on December 22, 2017, which reduced the U.S. federal corporate tax rate from 35% to 21%. We expect our effective tax rate for 2018 will range from 24.5% to 25.5%. Due to the complexities involved in accounting for the enactment of the Act, the SEC Staff Accounting Bulletin No. 118 (“SAB No. 118”) allows for a one-year period, from the date of enactment, to complete the related income tax accounting for the Act and allows for the use of provisional amounts until that accounting is complete. The Company recorded provisional amounts in earnings for the year ended December 31, 2017 as certain deferred tax assets and liabilities were remeasured based on the rates at which they are expected to reverse in the future, which is generally 21%. However, we are still analyzing aspects of the Act and refining our calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts until the federal income tax return for 2017 is filed later this year.

New Accounting Pronouncements

6 Months Ended

Jun. 30, 2018

Accounting Changes And Error Corrections [Abstract]

New Accounting Pronouncements

NOTE 10.

New Accounting Pronouncements

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805) Clarifying the Definition of a Business. This ASU clarifies the definition of a business when evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. This standard was adopted on January 1, 2018. Any impact would apply to future acquisitions.

In 2016, the FASB issued new guidance that requires credit losses on financial assets measured at amortized cost basis to be presented at the net amount expected to be collected, not based on incurred losses. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018 is permitted. We are evaluating the impact of adopting this new accounting guidance on our consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires lessees to recognize a right-to-use asset and a lease obligation for all leases. The new standard will become effective beginning with the first quarter of 2019, but early adoption is permitted. We plan to adopt this standard January 1, 2019, as required. The standard also provides an additional transition method to assist entities with the implementation. Entities that elect this option would adopt the new standard using a modified retrospective transition method, but they would recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption rather than in the earliest period presented. We will elect to apply a package of practical expedients and will not reassess at the date of initial adoption (1) whether any expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, or (3) initial direct costs for existing leases. Lessees can also make an accounting policy election to not recognize an asset and liability for leases with a term of twelve months or less. We will elect this short-term lease policy. We are currently reviewing our leases and evaluating the impact the adoption of this accounting guidance will have on the consolidated financial statements.

Interim Financial Statements (Policies)	6 Months Ended
Interim Financial Statements (Policies)	Jun. 30, 2018
Accounting Policies [Abstract]
Revenue	Revenue: 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. We generally recognize revenue over time because of continuous transfer of control to the customer. Since control is transferred over time, revenue and related transportation costs are recognized based on relative transit time, which is based on the extent of progress towards completion of the related performance obligation. We enter into contracts that can include various combinations of services, which are capable of being distinct and accounted for as separate performance obligations. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. 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. Service 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. These factors, discretion in setting prices and discretion in selecting vendors, further support reporting revenue on a gross basis for most of our revenue. The Company capitalizes commissions incurred in connection with obtaining a contract. The Company capitalized commissions associated with dedicated services of $0.4 million at June 30, 2018. Capitalized commission fees are amortized based on the transfer of services to which the assets relate and are included in selling, general and administrative expenses. In 2018, the amount of amortization was approximately $30,000. Costs incurred to fulfill an intermodal, truck brokerage or logistics contract are expensed as incurred according to the practical expedient that allows contract acquisition costs to be recognized immediately if the deferral period is one year or less. The Company applied Topic 606 retrospectively using the practical expedient in paragraph 606-10-65-1(f)(3), under which the Company does not disclose the amount of consideration allocated to the remaining performance obligations or an explanation of when the Company expects to recognize that amount as revenue for all reporting periods presented before January 1, 2018. We do not generally have a remaining performance obligation due to revenue generally being recognized using relevant transit time. We only had one significant accounting policy change that is disclosed below. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by Hub Group from a customer were previously recorded on a gross basis. Under Topic 606, these taxes are excluded from revenue. This change had an effect of $0.9 million and $1.6 million on revenue and transportation costs for the three and six months ending June 30, 2017, respectively.

Acquisition (Tables)

6 Months Ended

Jun. 30, 2018

Estenson Logistics, LLC [Member]

Unaudited Pro forma Consolidated Results of Operations

The following unaudited pro forma consolidated results of operations for 2017 assume that the acquisition of Estenson was completed as of January 1, 2017 (in thousands, except for per share amounts):

	Three Months		Six Months
	Ended		Ended
	June 30, 2017		June 30, 2017
Revenue	$	983,029	$	1,930,373
Net income	$	12,450	$	24,053
Earnings per share
Basic	$	0.38	$	0.73
Diluted	$	0.38	$	0.72

Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Summary of Operating Results and Certain Other Financial Data

The following is a summary of operating results and certain other financial data for our business segments (in thousands):

	Three Months									Three Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Revenue	$	888,238	$	314,078	$	(23,223	)	$	1,179,093	$	704,344	$	242,998	$	(23,746	)	$	923,596
Transportation costs		788,087		278,039		(23,223	)		1,042,903		631,787		214,238		(23,746	)		822,279
Gross margin		100,151		36,039		-			136,190		72,557		28,760		-			101,317

Costs and expenses:
Salaries and benefits		53,839		4,253		-			58,092		41,569		3,469		-			45,038
Agent fees and commissions		11		21,958		-			21,969		14		17,024		-			17,038
General and administrative		17,768		2,448		-			20,216		18,331		1,783		-			20,114
Depreciation and amortization		3,719		241		-			3,960		2,249		300		-			2,549
Total costs and expenses		75,337		28,900		-			104,237		62,163		22,576		-			84,739

Operating income	$	24,814	$	7,139	$	-		$	31,953	$	10,395	$	6,184	$	-		$	16,578

Capital Expenditures	$	46,337	$	745	$	-		$	47,082	$	22,937	$	31	$	-		$	22,968

	Six Months									Six Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Revenue	$	1,719,823	$	601,977	$	(46,736	)	$	2,275,064	$	1,380,824	$	484,832	$	(49,304	)	$	1,816,352
Transportation costs		1,529,297		533,522		(46,736	)		2,016,083		1,236,462		426,292		(49,304	)		1,613,450
Gross margin		190,526		68,455		-			258,981		144,362		58,540		-			202,902

Costs and expenses:
Salaries and benefits		105,909		8,190		-			114,099		81,164		7,053		-			88,217
Agent fees and commissions		25		41,086		-			41,111		31		35,000		-			35,031
General and administrative		36,170		4,550		-			40,720		36,810		4,128		-			40,938
Depreciation and amortization		7,478		487		-			7,965		4,357		604		-			4,961
Total costs and expenses		149,582		54,313		-			203,895		122,362		46,785		-			169,147

Operating income	$	40,944	$	14,142	$	-		$	55,086	$	22,000	$	11,755	$	-		$	33,755

Capital Expenditures	$	67,874	$	1,387	$	-		$	69,261	$	29,562	$	31	$	-		$	29,593

Schedule of Assets

	As of June 30, 2018									As of December 31, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Total assets	$	1,513,130	$	227,425	$	(7,051	)	$	1,733,504	$	1,470,792	$	210,088	$	(9,939	)	$	1,670,941
Goodwill	$	318,717	$	29,389	$	-		$	348,106	$	319,272	$	29,389	$	-		$	348,661

Summary of Revenue by Segment and Business Line

The following tables summarize our revenue by segment and business line (in thousands) for the quarter ended June 30:

	Three Months									Three Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Intermodal	$	526,028	$	141,221	$	(6,559	)	$	660,690	$	451,420	$	112,089	$	(12,866	)	$	550,643
Truck brokerage		114,936		103,168		(84	)		218,020		104,289		82,869		(310	)		186,848
Logistics		173,421		69,689		(16,580	)		226,530		148,635		48,040		(10,570	)		186,105
Dedicated		73,853		-		-			73,853		-		-		-			-
Total revenue	$	888,238	$	314,078	$	(23,223	)	$	1,179,093	$	704,344	$	242,998	$	(23,746	)	$	923,596

The following tables summarize our revenue by segment and business line (in thousands) for the six months ended June 30:

	Six Months									Six Months
	Ended June 30, 2018									Ended June 30, 2017
					Inter-			Hub						Inter-			Hub
					Segment			Group						Segment			Group
	Hub		Mode		Elims			Total		Hub		Mode		Elims			Total
Intermodal	$	1,008,522	$	270,995	$	(17,829	)	$	1,261,688	$	875,843	$	234,269	$	(28,103	)	$	1,082,009
Truck brokerage		234,955		203,889		(442	)		438,402		210,473		161,031		(695	)		370,809
Logistics		342,098		127,093		(28,450	)		440,741		294,508		89,532		(20,506	)		363,534
Dedicated		134,248		-		(15	)		134,233		-		-		-			-
Total revenue	$	1,719,823	$	601,977	$	(46,736	)	$	2,275,064	$	1,380,824	$	484,832	$	(49,304	)	$	1,816,352

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

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):

	Three Months Ended, June 30,				Six Months Ended, June 30,
	2018		2017		2018		2017

Net income for basic and diluted earnings per share	$	22,051	$	9,542	$	38,218	$	19,876

Weighted average shares outstanding - basic		33,389		33,220		33,382		33,213

Dilutive effect of stock options and restricted stock		173		42		138		105

Weighted average shares outstanding - diluted		33,562		33,262		33,520		33,318

Earnings per share - basic	$	0.66	$	0.29	$	1.14	$	0.60

Earnings per share - diluted	$	0.66	$	0.29	$	1.14	$	0.60

Fair Value Measurement (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Reconciliation of Changes in Fair value of Contingent Consideration

The following table sets forth a reconciliation of changes in the fair value of the contingent consideration:

Balance at December 31, 2017	$	4,703
Change in fair value (1)		(3,571	)
Balance at June 30, 2018	$	1,132

(1)

Long-Term Debt and Financing Arrangements (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of Outstanding Debt

	June 30,			December 31,
	2018			2017
	(in thousands except principal and interest payments)


Revolving line of credit	$	-		$	45,000

Secured Equipment Notes due on various dates in 2024 with monthly principal and interest payments between $403 and $83,000 commencing on various dates in 2017; interest is paid monthly at a fixed annual rate between 2.85% and 3.41%		12,691			13,586

Secured Equipment Notes due on various dates in 2023 with monthly principal and interest payments between $669 and $341,341 commencing on various dates in 2016, 2017 and 2018; interest is paid monthly at a fixed annual rate between 2.23% and 3.91%		91,077			36,981

Secured Equipment Notes due on various dates in 2022 with monthly principal and interest payments between $3,030 and $254,190 commencing on various dates from 2015 to 2017; interest is paid monthly at a fixed annual rate of between 2.16% and 2.87%		27,435			30,301

Secured Equipment Notes due on various dates in 2021 with monthly principal and interest payments between $1,940 and $352,655 commencing on various dates from 2014 to 2017; interest is paid monthly at a fixed annual rate between 2.04% and 2.96%		66,863			76,885

Secured Equipment Notes due on various dates in 2020 with monthly principal and interest payments between $3,614 and $398,496 commencing on various dates from 2013 to 2016; interest is paid monthly at a fixed annual rate between 1.72% and 2.78%		42,960			50,737

Secured Equipment Notes due on various dates in 2019 with monthly principal and interest payments between $1,594 and $325,050 commencing on various dates from 2013 to 2015; interest is paid monthly at a fixed annual rate between 1.79% and 2.62%		25,158			36,178

Secured Equipment Notes due on various dates in 2018 with monthly principal and interest payments between $6,480 and $163,428 commencing on various dates in 2013 and 2014; interest is paid monthly at a fixed annual rate between 2.05% and 2.7%		-			2,406

		266,184			292,074

Less current portion		(86,740	)		(77,266	)
Total long-term debt	$	179,444		$	214,808

Interim Financial Statements - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Capitalized commission fees		$ 400,000
Capitalized commission fees, amount of amortization		$ 30,000
(ASC) topic 606 \| Restatement Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Effective change on revenue and transportation costs	$ 900,000		$ 1,600,000

Acquisition - Additional Information (Detail)	6 Months Ended
Acquisition - Additional Information (Detail)	Jun. 30, 2018
Estenson Logistics, LLC [Member]
Business Acquisition [Line Items]
Business acquisition date	Jul. 01, 2017

Unaudited Pro forma Consolidated Results of Operations (Detail) - Estenson Logistics, LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Revenue	$ 983,029	$ 1,930,373
Net income	$ 12,450	$ 24,053
Earnings per share
Basic	$ 0.38	$ 0.73
Diluted	$ 0.38	$ 0.72

Business Segments - Additional Information (Detail)	6 Months Ended
Business Segments - Additional Information (Detail)	Jun. 30, 2018 Segment
Segment Reporting [Abstract]
Reporting business segments	2
Number of railheads	one or more

Summary of Operating Results and Certain Other Financial Data (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,179,093	$ 923,596	$ 2,275,064	$ 1,816,352
Transportation costs	1,042,903	822,279	2,016,083	1,613,450
Gross margin	136,190	101,317	258,981	202,902
Costs and expenses:
Salaries and benefits	58,092	45,038	114,099	88,217
Agent fees and commissions	21,969	17,038	41,111	35,031
General and administrative	20,216	20,114	40,720	40,938
Depreciation and amortization	3,960	2,549	7,965	4,961
Total costs and expenses	104,237	84,739	203,895	169,147
Operating income	31,953	16,578	55,086	33,755
Capital Expenditures	47,082	22,968	69,261	29,593
Operating Segments [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	888,238	704,344	1,719,823	1,380,824
Transportation costs	788,087	631,787	1,529,297	1,236,462
Gross margin	100,151	72,557	190,526	144,362
Costs and expenses:
Salaries and benefits	53,839	41,569	105,909	81,164
Agent fees and commissions	11	14	25	31
General and administrative	17,768	18,331	36,170	36,810
Depreciation and amortization	3,719	2,249	7,478	4,357
Total costs and expenses	75,337	62,163	149,582	122,362
Operating income	24,814	10,395	40,944	22,000
Capital Expenditures	46,337	22,937	67,874	29,562
Operating Segments [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Revenue	314,078	242,998	601,977	484,832
Transportation costs	278,039	214,238	533,522	426,292
Gross margin	36,039	28,760	68,455	58,540
Costs and expenses:
Salaries and benefits	4,253	3,469	8,190	7,053
Agent fees and commissions	21,958	17,024	41,086	35,000
General and administrative	2,448	1,783	4,550	4,128
Depreciation and amortization	241	300	487	604
Total costs and expenses	28,900	22,576	54,313	46,785
Operating income	7,139	6,184	14,142	11,755
Capital Expenditures	745	31	1,387	31
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Revenue	(23,223)	(23,746)	(46,736)	(49,304)
Transportation costs	$ (23,223)	$ (23,746)	$ (46,736)	$ (49,304)

Schedule of Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 1,733,504	$ 1,670,941
Goodwill, net	348,106	348,661
Operating Segments [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Total assets	1,513,130	1,470,792
Goodwill, net	318,717	319,272
Operating Segments [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Total assets	227,425	210,088
Goodwill, net	29,389	29,389
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Total assets	$ (7,051)	$ (9,939)

Summary of Revenue by Segment and Business Line (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,179,093	$ 923,596	$ 2,275,064	$ 1,816,352
Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue	660,690	550,643	1,261,688	1,082,009
Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue	218,020	186,848	438,402	370,809
Logistics [Member]
Segment Reporting Information [Line Items]
Revenue	226,530	186,105	440,741	363,534
Dedicated [Member]
Segment Reporting Information [Line Items]
Revenue	73,853		134,233
Operating Segments [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	888,238	704,344	1,719,823	1,380,824
Operating Segments [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Revenue	314,078	242,998	601,977	484,832
Operating Segments [Member] \| Intermodal [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	526,028	451,420	1,008,522	875,843
Operating Segments [Member] \| Intermodal [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Revenue	141,221	112,089	270,995	234,269
Operating Segments [Member] \| Truck brokerage [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	114,936	104,289	234,955	210,473
Operating Segments [Member] \| Truck brokerage [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Revenue	103,168	82,869	203,889	161,031
Operating Segments [Member] \| Logistics [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	173,421	148,635	342,098	294,508
Operating Segments [Member] \| Logistics [Member] \| Mode LLC [Member]
Segment Reporting Information [Line Items]
Revenue	69,689	48,040	127,093	89,532
Operating Segments [Member] \| Dedicated [Member] \| Hub [Member]
Segment Reporting Information [Line Items]
Revenue	73,853		134,248
Intersegment Elims [Member]
Segment Reporting Information [Line Items]
Revenue	(23,223)	(23,746)	(46,736)	(49,304)
Intersegment Elims [Member] \| Intermodal [Member]
Segment Reporting Information [Line Items]
Revenue	(6,559)	(12,866)	(17,829)	(28,103)
Intersegment Elims [Member] \| Truck brokerage [Member]
Segment Reporting Information [Line Items]
Revenue	(84)	(310)	(442)	(695)
Intersegment Elims [Member] \| Logistics [Member]
Segment Reporting Information [Line Items]
Revenue	$ (16,580)	$ (10,570)	(28,450)	$ (20,506)
Intersegment Elims [Member] \| Dedicated [Member]
Segment Reporting Information [Line Items]
Revenue			$ (15)

Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income for basic and diluted earnings per share	$ 22,051	$ 9,542	$ 38,218	$ 19,876
Weighted average shares outstanding - basic	33,389	33,220	33,382	33,213
Dilutive effect of stock options and restricted stock	173	42	138	105
Weighted average shares outstanding - diluted	33,562	33,262	33,520	33,318
Earnings per share - basic	$ 0.66	$ 0.29	$ 1.14	$ 0.60
Earnings per share - diluted	$ 0.66	$ 0.29	$ 1.14	$ 0.60

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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+ Details

- Definition

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

+ References + Details

Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Fair Value Measurement [Line Items]
Fair value of fixed-rate borrowings less than historical carrying value	$ 3.6	$ 2.4
Fixed-rate borrowings, carrying value	266.2	247.1
Restricted investments	24.1	$ 24.2
Estenson Logistics, LLC [Member]
Fair Value Measurement [Line Items]
Fair value of contingent consideration	$ 1.1

Reconciliation of Changes in Fair value of Contingent Consideration (Detail)
$ in Thousands

6 Months Ended

Jun. 30, 2018

USD ($)

Fair Value Disclosures [Abstract]

Fair value, Beginning Balance

$ 4,703

Change in fair value

(3,571)

^[1]

Fair value, Ending Balance

$ 1,132

[1]

Long-Term Debt and Financing Arrangements - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Revolving Line of Credit Facility [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 350,000,000
Borrowings under bank revolving line of credit		$ 45,000,000
Revolving Line of Credit Facility [Member] \| Bank Revolving Line of Credit [Member]
Line Of Credit Facility [Line Items]
Unused and available borrowings under bank revolving line of credit	327,000,000	284,900,000
Borrowings under bank revolving line of credit	$ 0	$ 45,000,000
Standby Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Letters of credit expiration year one	2018
Letters of credit expiration year two	2019
Outstanding letters of credit	$ 23,000,000

Schedule of Outstanding Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Revolving line of credit & Secured long-term debt	$ 266,184	$ 292,074
Less current portion	(86,740)	(77,266)
Total long-term debt	179,444	214,808
Revolving Line of Credit [Member]
Debt Instrument [Line Items]
Revolving line of credit		45,000
Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Secured long-term debt	12,691	13,586
Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Secured long-term debt	91,077	36,981
Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Secured long-term debt	27,435	30,301
Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Secured long-term debt	66,863	76,885
Secured Equipment Notes due in 2020 [Member]
Debt Instrument [Line Items]
Secured long-term debt	42,960	50,737
Secured Equipment Notes due in 2019 [Member]
Debt Instrument [Line Items]
Secured long-term debt	$ 25,158	36,178
Secured Equipment Notes due in 2018 [Member]
Debt Instrument [Line Items]
Secured long-term debt		$ 2,406

Schedule of Outstanding Debt (Parenthetical) (Detail)	6 Months Ended
Schedule of Outstanding Debt (Parenthetical) (Detail)	Jun. 30, 2018 USD ($)
Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2024
Payment Frequency	monthly
Secured Equipment Notes due in 2024 [Member] \| Commencing on 2017 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2017
Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2023
Payment Frequency	monthly
Secured Equipment Notes due in 2023 [Member] \| Commencing on 2017 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2017
Secured Equipment Notes due in 2023 [Member] \| Commencing on 2016 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2016
Secured Equipment Notes due in 2023 [Member] \| Commencing on 2018 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2018
Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2022
Payment Frequency	monthly
Secured Equipment Notes due in 2022 [Member] \| Commencing on 2017 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2017
Secured Equipment Notes due in 2022 [Member] \| Commencing on 2015 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2015
Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2021
Payment Frequency	monthly
Secured Equipment Notes due in 2021 [Member] \| Commencing on 2017 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2017
Secured Equipment Notes due in 2021 [Member] \| Commencing on 2014 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2014
Secured Equipment Notes due in 2020 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2020
Payment Frequency	monthly
Secured Equipment Notes due in 2020 [Member] \| Commencing on 2016 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2016
Secured Equipment Notes due in 2020 [Member] \| Commencing on 2013 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2013
Secured Equipment Notes due in 2019 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2019
Payment Frequency	monthly
Secured Equipment Notes due in 2019 [Member] \| Commencing on 2013 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2013
Secured Equipment Notes due in 2019 [Member] \| Commencing on 2015 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2015
Secured Equipment Notes due in 2018 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2018
Payment Frequency	monthly
Secured Equipment Notes due in 2018 [Member] \| Commencing on 2013 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2013
Secured Equipment Notes due in 2018 [Member] \| Commencing on 2014 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2014
Minimum [Member] \| Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 403
Interest rate secured debt	2.85%
Minimum [Member] \| Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 669
Interest rate secured debt	2.23%
Minimum [Member] \| Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 3,030
Interest rate secured debt	2.16%
Minimum [Member] \| Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 1,940
Interest rate secured debt	2.04%
Minimum [Member] \| Secured Equipment Notes due in 2020 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 3,614
Interest rate secured debt	1.72%
Minimum [Member] \| Secured Equipment Notes due in 2019 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 1,594
Interest rate secured debt	1.79%
Minimum [Member] \| Secured Equipment Notes due in 2018 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 6,480
Interest rate secured debt	2.05%
Maximum [Member] \| Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 83,000
Interest rate secured debt	3.41%
Maximum [Member] \| Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 341,341
Interest rate secured debt	3.91%
Maximum [Member] \| Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 254,190
Interest rate secured debt	2.87%
Maximum [Member] \| Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 352,655
Interest rate secured debt	2.96%
Maximum [Member] \| Secured Equipment Notes due in 2020 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 398,496
Interest rate secured debt	2.78%
Maximum [Member] \| Secured Equipment Notes due in 2019 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 325,050
Interest rate secured debt	2.62%
Maximum [Member] \| Secured Equipment Notes due in 2018 [Member]
Debt Instrument [Line Items]
Monthly payments	$ 163,428
Interest rate secured debt	2.70%

Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Nov. 30, 2016 Container	Jun. 30, 2018 Container Tractor Trailer	Jun. 30, 2018 USD ($) Tractor Trailer
Commitments And Contingencies Disclosure [Abstract]
Purchase contract units, containers \| Container	4,000	3,670
Purchase contract units tractors \| Tractor			869
Cost of purchasing tractors \| $			$ 107.2
Number of tractors received \| Tractor		380	380
Number of tractors expected to be received in remainder of fiscal year \| Tractor		489	489
Purchase contract units trailers \| Trailer			760
Cost of purchasing trailers \| $			$ 24.2
Number of trailers received \| Trailer		217	217
Number of trailers expected to be received in remainder of fiscal year \| Trailer		543	543

Legal Matters - Additional Information (Detail) - Robles Lawsuits [Member]		1 Months Ended	6 Months Ended
	Aug. 05, 2015 Plaintiff Employee	May 31, 2015 Plaintiff	Jun. 30, 2018
Loss Contingencies [Line Items]
Percentage of California drivers who accepted settlement offers			96.00%
Number of new plaintiffs		2
Number of plaintiffs against Hub Group Trucking	63
Number of employees filed lawsuit \| Employee	5
Number of claims accepted settlement offers	58

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Provision for income taxes increased	$ 7,548	$ 6,204	$ 12,377	$ 12,273
Effective income tax rate	25.50%	39.40%	24.50%	38.20%
Federal corporate tax rate			21.00%			35.00%
Scenario, Plan [Member] \| Minimum [Member]
Income Taxes [Line Items]
Effective income tax rate					24.50%
Scenario, Plan [Member] \| Maximum [Member]
Income Taxes [Line Items]
Effective income tax rate					25.50%