Hub (HUBG) 10-K 25 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Trading Symbol	HUBG
Entity Registrant Name	HUB GROUP, INC.
Entity Central Index Key	0000940942
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 2,162,250,176
Title of 12(b) Security	Class A Common Stock, par value $0.01 per share
Security Exchange Name	NASDAQ
Entity File Number	0-27754
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-4007085
Entity Address, Address Line One	2000 Clearwater Drive
Entity Address, City or Town	Oak Brook
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60523
City Area Code	630
Local Phone Number	271-3600
Document Annual Report	true
Document Transition Report	false
ICFR Auditor Attestation Flag	true
Documents Incorporated by Reference	The Registrant’s definitive Proxy Statement for the Annual Meeting of Stockholders to be held o n May 24, 2022 ( the “Proxy Statement”) is incorporated by reference in Part III of this Form 10-K to the extent stated herein. Except with respect to information specifically incorporated by reference in this Form 10-K, the Proxy Statement is not deemed to be filed as a part hereof.
Auditor Name	Ernst & Young LLP
Auditor Location	Chicago, Illinois
Auditor Firm ID	42
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		34,029,436
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		662,296

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 159,784	$ 124,506
Accounts receivable trade, net	701,512	518,975
Other receivables	3,022	1,265
Prepaid taxes	2,191	1,336
Prepaid expenses and other current assets	27,779	26,753
TOTAL CURRENT ASSETS	894,288	672,835
Restricted investments	24,256	23,353
Property and equipment, net	681,451	671,101
Right-of-use assets - operating leases	44,036	43,573
Right-of-use assets - financing leases	1,252	3,557
Other intangibles, net	196,672	163,953
Goodwill, net	576,913	508,555
Other assets	18,426	18,469
TOTAL ASSETS	2,437,294	2,105,396
CURRENT LIABILITIES:
Accounts payable trade	424,923	285,320
Accounts payable other	12,493	12,680
Accrued payroll	56,938	23,044
Accrued other	82,827	102,613
Lease liability - operating leases	11,364	10,093
Lease liability - financing leases	1,251	1,793
Current portion of long-term debt	97,273	93,562
TOTAL CURRENT LIABILITIES	687,069	529,105
Long-term debt	177,479	176,797
Non-current liabilities	41,572	42,910
Lease liability - operating leases	34,916	36,328
Lease liability - financing leases	0	8
Deferred taxes	155,944	162,325
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2020 and 2019	0	0
Additional paid-in capital	189,256	186,058
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	15,458	15,458
Retained earnings	1,424,634	1,253,160
Accumulated other comprehensive loss	(207)	(191)
Treasury stock; at cost, 7,675,084 shares in 2021 and 7,675,084 shares in 2020	(258,330)	(266,065)
TOTAL STOCKHOLDERS' EQUITY	1,340,314	1,157,923
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,437,294	2,105,396
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 ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
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	7,317,058	7,675,084
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	33,907,734	33,549,708
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 INCO

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenue	$ 4,232,383	$ 3,495,644	$ 3,668,117
Transportation costs	3,632,743	3,070,207	3,147,047
Gross margin	599,640	425,437	521,070
Costs and expenses:
Salaries and benefits	247,240	188,777	235,963
General and administrative	76,476	99,597	104,206
Depreciation and amortization	37,467	31,237	28,481
Total costs and expenses	361,183	319,611	368,650
Operating income	238,457	105,826	152,420
Other income (expense):
Interest expense	(7,307)	(9,746)	(10,994)
Interest income	5	403	2,103
Other, net	(245)	(383)	341
Total other income (expense)	(7,547)	(9,726)	(8,550)
Income from continuing operations before income taxes	230,910	96,100	143,870
Income tax expense	59,436	22,541	36,699
Net income	171,474	73,559	107,171
Other comprehensive (loss) income:
Foreign currency translation adjustments	(16)	(5)	(4)
Total comprehensive income	$ 171,458	$ 73,554	$ 107,167
Earnings per share from continuing operations
Basic	$ 5.13	$ 2.22	$ 3.22
Diluted	5.06	2.19	3.20
Earnings per share net income
Basic	5.13	2.22	3.22
Diluted	$ 5.06	$ 2.19	$ 3.20
Basic weighted average number of shares outstanding	33,434	33,180	33,284
Diluted weighted average number of shares outstanding	33,892	33,543	33,480

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect Period Of Adoption Adjustment [Member]	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]	Retained Earnings [Member]Cumulative Effect Period Of Adoption Adjustment [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2018	$ 980,834		$ 419	$ 172,220	$ (15,458)	$ 1,072,456		$ (182)	$ (248,621)
Beginning Balance (in shares) at Dec. 31, 2018			41,887,088						(7,431,083)
Accounting Standards Update [Extensible List]		ASU No. 2016-02 [Member]					ASU No. 2016-02 [Member]
Purchase of treasury shares	(24,998)								$ (24,998)
Purchase of treasury shares (in shares)									(626,320)
Stock tendered for payments of withholding taxes	(3,984)								$ (3,984)
Stock tendered for payments of withholding taxes (in shares)									(98,260)
Issuance of restricted stock awards, net of forfeitures				(8,869)					$ 8,869
Issuance of restricted stock awards, net of forfeitures (in shares)									284,775
Share-based compensation expense	16,286			16,286
Net income	107,171					107,171
Foreign currency translation adjustment	(4)							(4)
Ending Balance at Dec. 31, 2019	1,075,279	$ (26)	$ 419	179,637	(15,458)	1,179,601	$ (26)	(186)	$ (268,734)
Ending Balance (in shares) at Dec. 31, 2019			41,887,088						(7,870,888)
Stock tendered for payments of withholding taxes	(7,963)								$ (7,963)
Stock tendered for payments of withholding taxes (in shares)									(148,242)
Issuance of restricted stock awards, net of forfeitures				(10,632)					$ 10,632
Issuance of restricted stock awards, net of forfeitures (in shares)									344,046
Share-based compensation expense	17,053			17,053
Net income	73,559					73,559
Foreign currency translation adjustment	(5)							(5)
Ending Balance at Dec. 31, 2020	$ 1,157,923		$ 419	186,058	(15,458)	1,253,160		(191)	$ (266,065)
Ending Balance (in shares) at Dec. 31, 2020			41,887,088						(7,675,084)
Purchase of treasury shares (in shares)	134,329
Stock tendered for payments of withholding taxes	$ (9,123)								$ 9,123
Stock tendered for payments of withholding taxes (in shares)									(134,329)
Issuance of restricted stock awards, net of forfeitures				(16,858)					$ 16,858
Issuance of restricted stock awards, net of forfeitures (in shares)									492,355
Share-based compensation expense	20,056			20,056
Net income	171,474					171,474
Foreign currency translation adjustment	(16)							(16)
Ending Balance at Dec. 31, 2021	$ 1,340,314		$ 419	$ 189,256	$ (15,458)	$ 1,424,634		$ (207)	$ (258,330)
Ending Balance (in shares) at Dec. 31, 2021			41,887,088						(7,317,058)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 171,474,000	$ 73,559,000	$ 107,171,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	130,629,000	123,679,000	116,887,000
Deferred taxes	(3,992,000)	7,463,000	1,821,000
Compensation expense related to share-based compensation plans	20,056,000	17,053,000	16,286,000
(Gain) loss on sale of assets	(19,173,000)	907,000	(745,000)
Other operating activities		6,385,000	0
Changes in operating assets and liabilities, net of acquisitions:
Restricted investments	(903,000)	(752,000)	(3,365,000)
Accounts receivable, net	(115,568,000)	(47,219,000)	32,732,000
Prepaid taxes	(856,000)	(707,000)	(14,000)
Prepaid expenses and other current assets	(647,000)	(2,508,000)	3,447,000
Other assets	(2,883,000)	(2,177,000)	(3,786,000)
Accounts payable	78,448,000	5,594,000	(14,933,000)
Accrued expenses	9,686,000	(4,408,000)	(122,000)
Non-current liabilities	(13,436,000)	(1,915,000)	(870,000)
Net cash provided by operating activities	252,835,000	174,954,000	254,509,000
Cash flows from investing activities:
Proceeds from sale of equipment	45,177,000	3,289,000	10,025,000
Purchases of property and equipment	(132,952,000)	(115,306,000)	(94,847,000)
Acquisitions, net of cash acquired	(122,360,000)	(84,845,000)	(734,000)
Proceeds from the disposition of discontinued operations	0	0	19,439,000
Net cash used in investing activities	(210,135,000)	(196,862,000)	(66,117,000)
Cash flows from financing activities:
Proceeds from issuance of debt	112,001,000	187,475,000	56,494,000
Repayments of long-term debt	(107,608,000)	(198,741,000)	(105,653,000)
Stock tendered for payments of withholding taxes	(9,123,000)	(7,963,000)	(3,984,000)
Purchase of treasury stock	0	0	(24,998,000)
Finance lease payments	(2,682,000)	(3,066,000)	(2,954,000)
Net cash used in financing activities	(7,412,000)	(22,295,000)	(81,095,000)
Effect of exchange rate changes on cash and cash equivalents	(10,000)	(20,000)	(3,000)
Net increase (decrease) in cash and cash equivalents	35,278,000	(44,223,000)	107,294,000
Cash and cash equivalents beginning of the year	124,506,000	168,729,000	61,435,000
Cash and cash equivalents end of the year	159,784,000	124,506,000	168,729,000
Supplemental disclosures of cash paid for:
Interest	7,602,000	9,458,000	11,262,000
Income taxes	$ 58,593,000	$ 18,388,000	$ 40,289,000

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
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. (“Hub”, “we”, “us” or “our”) is a leading supply chain solutions provider that offers comprehensive transportation and logistics management services focused on reliability, visibility and value for our customers. Our service offerings include a full range of freight transportation and logistics services, some of which are provided by assets we own and operate, and some of which are provided by third parties with whom we contract. Our transportation services include intermodal, truckload, less-than-truckload, flatbed, temperature-controlled, dedicated and regional trucking. Our logistics services include full outsource logistics solutions, transportation management services, freight consolidation, warehousing and fulfillment, final mile delivery, parcel and international services. On October 19, 2021, we acquired Choptank Transport, LLC ("Choptank") and on December 9, 2020, we acquired NonstopDelivery, LLC (“NSD”). Refer to Note 4 ” Aquisitions“ for additional information. 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, 2021 and 2020 , our cash and temporary investments were with high quality financial institutions in demand deposit accounts (“DDAs”), savings accounts and an interest-bearing checking account. Accounts Receivable and Allowance for Uncollectible Accounts: On January 1, 2020, we adopted ASU 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASC 326), which replaces the incurred loss methodology with an expected loss methodology that is referred to as the Current Expected Credit Loss (“CECL”). The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including trade receivables. The impact of adopting the standard was immaterial. In accordance with the standard, trade receivables are reported at amortized cost net of the allowance for credit losses. The allowance for credit losses is a valuation account that is deducted from the trade receivables’ amortized cost basis to present the net amount expected to be collected on the receivables. Trade receivables are charged off against the allowance when we believe the uncollectibility of a receivable balance is confirmed, and the expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Management continuously reviews and assesses the environment, especially with the COVID-19 pandemic, and its potential impact on the credit worthiness and collectability of our accounts receivable with customers most affected by the COVID-19 pandemic. Our allowance for credit losses is presented in the allowance for uncollectible trade accounts and is immaterial at December 31, 2021 and 2020. The allowance for uncollectible trade accounts also includes estimated adjustments to revenue for items such as billing disputes. Our reserve for uncollectible accounts was approximately $ 20.1 million and $ 8.3 million as of December 31, 2021 and 2020 , 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 10 years; furniture and equipment, up to 10 years; and transportation equipment up to 16 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 10 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 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. Capitalized Internal Use Software and Cloud Computing Costs: We capitalize internal and external costs, which include costs related to the development of our cloud computing or hosting arrangements, incurred to develop internal use software per ASC Subtopic 350-40. Internal use software has both the of the following characteristics: the software is acquired, internally developed, or modified solely to meet our needs and during the development or modification, no substantive plan exists or is being developed to market the software externally. Only costs incurred during the application development stage and costs to develop or obtain software that allows for access to or conversion of old data by new systems are capitalized. Capitalization of costs begins when the preliminary project stage is complete, management has committed to funding the project and it is probable the project will be completed, and the software will be used to perform its intended function. The measurement of the costs to capitalize include fees paid to third parties, costs incurred to obtain software from third parties, travel expenses incurred by employees in their duties associated with developing software, payroll related costs for employees who spend time directly on the project and interest costs incurred while developing internal-use software or implementing a hosting arrangement. Capitalization ceases no later than when the project is substantially complete and ready for its intended use, after all substantial testing is complete. 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 only have one reporting unit. We assess qualitative factors such as current company performance and overall economic factors to determine if it is more-likely-than-not that the fair value of our reporting unit was less than its carrying value 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 fair value of the reporting unit is less than the carrying amount, then a goodwill impairment charge will be recognized in the amount by which carrying amount exceeds fair value, limited to the total amount of goodwill allocated to that reporting unit. We performed our annual assessment in the fourth quarter of 2021 and 2020 as required and determined it was not more-likely-than-not that the fair value of our reporting unit was less than its carrying value. 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. Claims Accruals: We purchase insurance coverage for a portion of expenses related to employee injuries, vehicular collisions, accidents, and cargo damage. Certain insurance arrangements include high self-insurance retention limits or deductibles applicable to each claim. We have umbrella policies to limit our exposure to large claim costs. Our claims accrual policy for all self-insured claims is to recognize a liability at the time of the incident based on our analysis of the nature and severity of the claims and analyses provided by third-party claims administrators, as well as legal and regulatory factors. Our safety and claims personnel work directly with representatives from the insurance companies to continually update the estimated cost of each claim. The ultimate cost of a claim develops over time as additional information regarding the nature, timing, and extent of damages claimed becomes available. Accordingly, we use an actuarial method to develop current claim information to derive an estimate of our ultimate claim liability. This process involves the use of loss-development factors based on our historical claims experience. In doing so, the recorded liability factors in future growth of claims and an allowance for incurred-but-not-reported claims. We do not discount our estimated losses. In addition, we record receivables for amounts expected to be reimbursed for payments made in excess of self-insurance levels on covered claims related to auto liability and workers’ compensation. At December 31, 2021 and 2020, we had an accrual of approximately $ 30.8 million and $ 32.1 million, respectively for estimated claims. We had no significant receivables recorded for payments in excess of our self-insu red levels. Our claims accruals are classified in accrued other and non-current liabilities in the consolidated balance sheets, based on when the claim is estimated to be paid. 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, savings accounts and an interest-bearing checking account. We primarily serve customers located throughout the United States with no significant concentration in any one region. In each of the years ended December 31, 2021 and 2020, one customer accounted for more than 10 % of our annual revenue. No one customer accounted for more than 10 % of our annual revenue for the year ended December 31, 2019. We revie w 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 : In accordance with the Accounting Standards Codification (ASC) topic 606, Revenue from Contracts with Customers our significant accounting policy for revenue is as follows: Revenue is recognized when we transfer services to our customer in an amount that reflects the consideration we expect to receive. 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. 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. 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 prices to our customers 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. Provision for Income Taxes: Significant judgment is required in determining and assessing the impact of complex tax laws and certain tax-related contingencies on our provision for income taxes. As part of our calculation of the provision for income taxes, we assess whether the benefits of our tax positions are at least more likely than not to be sustained upon audit based on the technical merits of the tax position. For tax positions that are not more likely than not to be sustained upon audit, we accrue the largest amount of the benefit that is not more likely than not to be sustained in our financial statements. Such accruals require us to make estimates and judgments, whereby actual results could vary materially from these estimates. Further, years may elapse before a particular matter for which we have established an accrual is audited and resolved or its statute of limitations expires. We recognize interest expense and penalties related to income tax liabilities in our provision for income taxes. Deferred income taxes are recognized for the future tax effects of temporary differences between financial statement 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 one exception. We have established a valuation allowance of $ 5.0 million related to federal and state tax credit carryforwards. In the event the probability of realizing the remaining deferred tax assets does not meet the more likely than not threshold in the future, a valuation allowance would be established for the deferred tax assets deemed unrecoverable. 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 restricted stock 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 and is included in salaries and benefits . New Pronouncements: In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU clarifies and simplifies accounting for income taxes by eliminating certain exceptions for intraperiod tax allocation principles, the methodology for calculating income tax rates in an interim period, and recognition of deferred taxes for outside basis difference in an investment, among other updates. The effective date of this ASU is for fiscal years and interim periods beginning after December 15, 2020. We adopted the standard as of January 1, 2021, but it did not have an impact on our financial statement. Use of Estimates : The preparation of financial statements in conformity with United States 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 uncollectible trade accounts, exposure for self-insured claims under our insurance policies and useful lives of assets. Actual results could differ from these estimates. Reclassifications: Certain prior year immaterial amounts have been reclassified in Note 5, Revenue from Contracts with Customers, to conform with the current year presentation.

Capital Structure

Capital Structure	12 Months Ended
	Dec. 31, 2021
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 84 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, 2021
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, 2021 2020 2019 Net income $ 171,474 $ 73,559 $ 107,171 Weighted average shares outstanding - basic 33,434 33,180 33,284 Dilutive effect of restricted stock 458 363 196 Weighted average shares outstanding - diluted 33,892 33,543 33,480 Earnings per share net income Basic $ 5.13 $ 2.22 $ 3.22 Diluted $ 5.06 $ 2.19 $ 3.20

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Acquisitions	NOTE 4. Acquisitions Choptank Transport, LLC Acquisition On October 19, 2021 , we acquired 100 % of the equity interests of Choptank. Total consideration for the transaction w as $ 127.6 million in cash and the settlement of accounts receivable due from Choptank of $ 0.3 million. In connection with the acquisition, we granted approximately $ 22 million of restricted stock to Choptank's owners and senior management team, which is subject to certain vesting conditions. The grants of restricted stock were made pursuant to award agreements and issued under our 2017 Long Term Incentive Plan. The acquisition of Choptank enhanced our refrigerated trucking transportation solutions offering and complemented our growing fleet of refrigerated intermodal containers. Choptank has developed a best-in-class proprietary technology platform that we will leverage to enhance our truck brokerage service line. The initial accounting for the acquisition of Choptank is incomplete as we, with the support of our valuation specialist, are in the process of finalizing the fair market value calculations of the acquired net assets. In addition, we are preparing a review of the applicable future cash flows used in determining the purchase accounting. Finally, certain post-closing activities outlined in the acquisition agreement remain incomplete. As a result, the amounts recorded in the consolidated financial statements related to the Choptank acquisition are preliminary and subject to change. The following table summarizes the preliminary allocation of the total consideration to the assets acquired and liabilities assumed as of the date of the acquisition (in thousands): October 19, 2021 Cash and cash equivalents $ 5,596 Accounts receivable trade 71,576 Prepaid expenses and other current assets 419 Property and equipment 169 Right of use assets - operating leases 872 Goodwill, net 54,553 Other intangibles 60,500 Total assets acquired $ 193,685 Accounts payable trade $ 60,970 Accrued payroll 3,458 Accrued other 519 Lease liability - operating leases short-term 311 Lease liability - operating leases long-term 561 Total liabilities assumed $ 65,819 Total consideration $ 127,866 Cash paid, net $ 122,270 The Choptank acquisition was accounted for as a purchase business combination in accordance with ASC 805 “Business Combinations.” Assets acquired and liabilities assumed were recorded in the accompanying consolidated balance sheet at their estimated fair values as of October 19, 2021 with the remaining unallocated purchase price recorded as goodwill. The goodwill recognized in the Choptank acquisition was primarily attributable to potential expansion and future development of the acquired business. Tax history and attributes are not inherited in an equity purchase of this kind, however, the goodwill and other intangibles recognized in this purchase will be fully tax deductible over a period of 15 years. We incurred approximately $ 1.1 million of transaction costs associated with this transaction prior to the closing date that are reflected in general and administrative expense in the accompanying Consolidated Statements of Income for the year ended December 31, 2021. The components of “Other intangibles” listed in the above table as of the acquisition date are preliminarily estimated as follows (in thousands): Accumulated Balance at Estimated Useful Amount Amortization December 31, 2021 Life Customer relationships $ 36,300 $ 605 $ 35,695 15 years Carrier network $ 14,400 $ 900 $ 13,500 4 years Developed technology $ 6,500 $ 232 $ 6,268 7 years Trade name $ 3,300 $ 550 $ 2,750 18 months The above intangible assets are amortized using the straight-line method. Amortization expense related to this acquisition for the year ended December 31, 2021 was $ 2.3 million. The intangible assets have a weighted average useful life of approximately 10.7 years. Amortization expense related to Choptank for the next five years is as follows (in thousands): Total Year 1 $ 9,149 Year 2 7,499 Year 3 6,949 Year 4 6,049 Year 5 3,349 From the date of the acquisition through December 31, 2021, Choptank’s revenue was $ 112.2 million and operating income was $ 0.3 million. NonstopDelivery, LLC Acquisition On December 9, 2020 , we acquired 100 % of the equity interests of NSD. Total consideration for the transaction was $ 105.9 million which consisted of cash paid of $ 89.8 million, of which $ 0.1 million was paid in the second quarter of 2021 as part of the post-closing true-up, and the settlement of Hub’s accounts receivable due from NSD of $ 16.1 million. The acquisition of NSD expanded our logistics service offering to include final mile logistics. NSD provides residential final mile delivery services through a non-asset business model, working with a network of nearly 200 carriers throughout the country. The financial results, since the acquisition date, of NSD are included in our logistics line of business. The following table summarizes the allocation of the total consideration to the assets acquired and liabilities assumed as of the date of the acquisition (in thousands): December 9, 2020 Cash and cash equivalents $ 4,775 Accounts receivable trade 25,927 Prepaid expenses and other current assets 207 Property and equipment 1,018 Right of use assets - operating leases 1,295 Goodwill, net 38,156 Other intangibles 47,700 Other assets 14 Total assets acquired $ 119,092 Accounts payable trade $ 9,972 Accrued payroll 1,324 Accrued other 578 Lease liability - operating leases short-term 373 Lease liability - operating leases long-term 922 Total liabilities assumed $ 13,169 Total consideration $ 105,923 Cash paid, net $ 84,989 The NSD acquisition was accounted for as a purchase business combination in accordance with ASC 805 “Business Combinations.” Assets acquired and liabilities assumed were recorded in the accompanying consolidated balance sheet at their estimated fair values as of December 9, 2020 with the remaining unallocated purchase price recorded as goodwill. The goodwill recognized in the NSD acquisition was primarily attributable to potential expansion and future development of the acquired business. Tax history and attributes are not inherited in an equity purchase of this kind, however, the goodwill and other intangibles recognized in this purchase will be fully tax deductible over a period of 15 years . We incurred approximately $ 1.0 million of transaction costs associated with this transaction prior to the closing date that are reflected in general and administrative expense in the accompanying Consolidated Statements of Income for the year ended December 31, 2020. The components of “Other intangibles” listed in the above table as of the acquisition date are estimated as follows (in thousands): Accumulated Balance at Estimated Useful Amount Amortization December 31, 2021 Life Customer relationships $ 46,200 $ 3,337 $ 42,863 15 years Trade name $ 900 $ 650 $ 250 18 months Agent relationships $ 600 $ 163 $ 437 4 years The above intangible assets are amortized using the straight-line method. Amortization expense related to this acquisition for the year ended December 31, 2021 was $ 3.7 million. The intangible assets have a weighted average useful life of approximately 13.73 years. From the date of the acquisition through December 31, 2020, NSD’s revenue was $ 10.2 million and operating income was $ 0.9 million. The following unaudited pro forma consolidated results of operations presents the effects of Choptank as though it had been acquired as of January 1, 2020 and NSD as though it had been acquired as of January 1, 2019 (in thousands, except for per share amounts): Years Ended December 31, 2021 December 31, 2020 December 31, 2019 Revenue $ 4,624,385 $ 3,887,189 $ 3,733,507 Net income $ 173,254 $ 79,578 $ 107,998 Earnings per share Basic $ 5.18 $ 2.40 $ 3.24 Diluted $ 5.11 $ 2.37 $ 3.23 The unaudited pro forma consolidated results for the annual periods were prepared using the acquisition method of accounting and are based on the historical financial information of Hub, NSD and Choptank. 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 Choptank acquisition as of January 1, 2020 and the NSD acquisition on January 1, 2019.

Revenue from Contract with Cust

Revenue from Contract with Customers	12 Months Ended
	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue from Contracts with Customers	NOTE 5. Revenue from Contracts with Customers See Note 1 – Description of Business and Summary of Significant Accounting Policies for significant accounting policy for revenue. Hub offers comprehensive multimodal solutions including intermodal, logistics, truck brokerage and dedicated services throughout the United States, Canada and Mexico. Intermodal. We offer high service, nationwide door-to-door intermodal transportation, providing value, visibility and reliability in both transcontinental and local lanes by combining rail transportation with local trucking. Our service offering is well positioned to assist our customers in reducing their transportation spend and achieving their carbon emissions objectives. As an intermodal provider, we arrange for the movement of our customers’ freight in containers, typically over long distances of 750 miles or more. We contract with railroads to provide transportation for the long-haul portion of the shipment between rail terminals. Local pickup and delivery services between origin or destination and rail terminals (referred to as “drayage”) are provided by our Hub Group Trucking, Inc. (“HGT”) subsidiary and third-party local trucking companies. Logistics . Our logistics business 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 shipment visibility. We offer multi-modal transportation services including full truckload, LTL, intermodal, final mile, railcar, small parcel and international transportation. We leverage proprietary technology along with collaborative relationships with third party service providers to deliver cost savings and performance-enhancing supply chain services to our clients. Our transportation management offering also serves as a source of volume for our intermodal and truck brokerage service lines. Our logistics offering also includes warehousing, cross-docking and consolidation services. Many of the customers for these solutions are consumer goods companies who sell into the retail channel. We do not own or operate any warehouses or cross-docks. We contract with third-party warehouse providers in seven markets across North America to which our customers ship their goods to be stored and consolidated, along with goods from other customers, into full truckload shipments destined to major retailers. These services offer our customers shipment visibility, transportation cost savings, high service and compliance with retailers’ increasingly stringent supply chain requirements. In December 2020, we acquired NSD which added residential final mile transportation services to our logistics offering. Our final mile services include warehousing, product assembly, inbound transportation to warehouses, delivery of goods to residential locations, and reverse logistics services. Customers for our final mile services include retailers and consumer goods companies. We contract with nearly 200 agents across the United States who provide warehousing and transportation to support our final mile offering. Truck Brokerage. We operate one of the largest truck brokerage operations in the United States, providing customers with a trucking option for their transportation needs. Our brokerage does not operate any trucks; instead we match customers’ needs with trucking carriers’ capacity to provide the most effective combination of service and price. We have contracts with a substantial base of carriers allowing us to meet the varied needs of our customers. Approximately half of our truck brokerage volume is generated from transactions in which we offer lane-based pricing at a fixed rate for periods of up to one year. The remaining portion of our volume is generated based on shorter term transactional lane-based rates which expire in a short time. We offer a full range of trucking transportation services, including dry van, expedited, less-than-truckload, refrigerated and flatbed. We substantially increased the size of our brokerage service line and increased our refrigerated transportation capabilities through the acquisition of Choptank in October 2021. Dedicated. Our dedicated trucking operation contracts with customers who require high service transportation using equipment dedicated to their 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. Contracts with customers generally include fixed and variable pricing arrangements and may include charges for early termination which serves to reduce the financial risk we bear with respect to the utilization of our equipment. As of December 31, 2021, dedicated employed approximately 1,100 drivers. The following table summarizes our disaggregated revenue by business line (in thousands) for the years ended December 31: 2021 2020 2019 Intermodal $ 2,391,494 $ 2,029,186 $ 2,083,464 Logistics 887,388 767,279 852,113 Truck brokerage 688,867 431,127 433,793 Dedicated 264,634 268,052 298,747 Total revenue $ 4,232,383 $ 3,495,644 $ 3,668,117

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2021
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 test. We performed a qualitative and quantitative assessment on goodwill and determined it was not, more-likely-than-not, that the fair value of our reporting unit was less than its carrying value. 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): Goodwill Balance at December 31, 2019 $ 484,459 Acquisition $ 24,315 Other ( 219 ) Balance at December 31, 2020 $ 508,555 Acquisitions 68,395 Other ( 37 ) Balance at December 31, 2021 $ 576,913 The changes noted as “other” in the table above for both 2021 and 2020 refer to the amortization of the income tax benefit of tax goodwill in excess of financial statement goodwill. The components of the “Other intangible assets” are as follows (in thousands): Net Gross Accumulated Carrying Amount Amortization Value Life As of December 31, 2021: Customer relationships $ 226,623 $ ( 53,156 ) $ 173,467 5 - 15 years Carrier network and agent relationships $ 15,000 $ ( 1,063 ) $ 13,937 4 years Developed technology $ 6,500 $ ( 232 ) $ 6,268 7 years Trade name $ 5,500 $ ( 2,500 ) $ 3,000 18 months Total $ 253,623 $ ( 56,951 ) $ 196,672 Net Gross Accumulated Carrying Amount Amortization Value Life As of December 31, 2020: Customer relationships $ 196,806 $ ( 36,765 ) $ 160,041 5 - 15 years Carrier network and agent relationships $ 2,432 $ ( 51 ) $ 2,381 4 years Trade name $ 2,921 $ ( 1,390 ) $ 1,531 18 months Total $ 202,159 $ ( 38,206 ) $ 163,953 The above intangible assets are amortized using the straight-line method. Amortization expense was $ 18.7 million and $ 13.8 million for each of the years ended December 31, 2021 and 2020 , respectively. The remaining weighted average life of all definite lived intangible assets was 10.30 years and 10.98 years for the years ended December 31, 2021 and 2020, respectively. Amortization expense for the next five years is as follows (in thousands): Total Year 1 $ 25,329 Year 2 23,284 Year 3 21,126 Year 4 20,089 Year 5 17,389

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
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, 2021 2020 2019 U.S. federal statutory rate 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 3.5 3.6 3.5 Federal and state incentives ( 0.5 ) ( 1.1 ) ( 0.9 ) State law changes 1.1 ( 0.2 ) 0.7 Permanent differences 0.6 0.2 1.2 Net effective rate 25.7 % 23.5 % 25.5 % The following is a summary of our provision for income taxes (in thousands): Years Ended December 31, 2021 2020 2019 Current Federal $ 51,918 $ 11,913 $ 31,209 State and local 13,876 3,597 3,979 Foreign 38 11 84 65,832 15,521 35,272 Deferred Federal ( 5,125 ) 6,548 ( 344 ) State and local ( 1,254 ) 465 1,788 Foreign ( 17 ) 7 ( 17 ) ( 6,396 ) 7,020 1,427 Total provision $ 59,436 $ 22,541 $ 36,699 The following is a summary of our deferred tax assets and liabilities (in thousands): December 31, 2021 2020 Accrued compensation 19,226 12,467 Other reserves 17,896 14,154 Tax credit carryforwards 8,286 8,715 Operating loss carryforwards 881 2,845 Lease accounting liability 11,956 11,669 Total gross deferred income taxes 58,245 49,850 Valuation allowances ( 5,023 ) ( 6,518 ) Total deferred tax assets 53,222 43,332 Prepaids ( 6,607 ) ( 6,404 ) Property and equipment ( 135,768 ) ( 132,669 ) Intangibles ( 55,466 ) ( 55,166 ) Lease right-of-use asset ( 11,325 ) ( 11,418 ) Total deferred tax liabilities ( 209,166 ) ( 205,657 ) Total deferred taxes $ ( 155,944 ) $ ( 162,325 ) We are subject to income taxation in the United States, 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. We do not permanently reinvest our foreign earnings, all amounts are accrued and accounted for, though not material. We acquired a federal net operating loss carryforward of $ 4.1 million through the acquisition by way of merger with CaseStack, LLC in December 2018. The Internal Revenue Service ("IRS") loss limitation rules allowed us to utilize $ 1.3 million in each of the 2021, 2020 and 2019 tax years. The remaining net operating loss of $ 0.2 million is expected to be fully utilized in 2022. Our state tax net operating losses total $ 0.6 million. Some of those state losses have no expiration date while others will expire between December 31, 2022 , and December 31, 2040 . Management believes it is more likely than not that the loss carryforward deferred tax assets will be realized. Our federal incentive tax credit carryforward of $ 0.1 million expires between December 31, 2025 , and December 31, 2028 . Our state incentive tax credit carryforwards of $ 8.2 million expire between December 31, 2022 , and December 31, 2026 . Management believes it is more likely than not that approximately $ 3.4 million of the incentive carryforward deferred tax assets will be realized and a valuation allowance of $ 5.0 million has been established for the remainder which are not expected to be realized. As of December 31, 2021 and December 31, 2020 , the amount of unrecognized tax benefits was $ 6.6 million and $ 4.3 million, respectively. If recognized, these benefits would decrease our income tax provision by $ 5.4 million and $ 3.7 million, respectively. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2021 2020 Gross unrecognized tax benefits - beginning of the year $ 4,292 $ 4,069 Gross increases (decreases) related to prior year tax positions 997 ( 52 ) Gross increases related to current year tax positions 1,794 1,484 Lapse of applicable statute of limitations ( 436 ) ( 1,209 ) Gross unrecognized tax benefits - end of year $ 6,647 $ 4,292 We recognize interest and penalties related to income tax liabilities in our provision for income taxes. In 2021, we included $ 0.1 million in our provision for income taxes. On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the "CARES Act") was enacted in response to the COVID-19 pandemic. Among other things, the CARES Act includes provisions related to refundable payroll tax credits, deferment of the employer portion of social security payments, net operating loss carryback periods, modifications to the net interest deduction limitations, and technical corrections to tax depreciation methods for qualified improvement property. Though some provisions of the CARES Act do impact the Company, there was no material effect on the Company’s consolidated financial condition or results of operations for the year ended December 31, 2020. On December 27, 2020, the Consolidated Appropriations Act (“CAA”) was enacted in further response to the COVID-19 pandemic, in combination with omnibus spending for the 2021 federal fiscal year. The CAA extended many of the provisions enacted by the CARES Act, the extension of which likewise did not have a material impact on the Company’s consolidated financial statements for the year ended December 31, 2021.

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 8. Fair Value Measurement The carrying value of cash and cash equivalents, accounts receivable and accounts payable materially approximated fair value as of December 31, 2021 and 2020. As of December 31, 2021, the $ 274.8 million carrying value of the Company's fixed-rate borrowings approximated the fair value. As of December 31, 2020 , the fair value of the Company’s fixed-rate borrowings was $ 6.1 million more than the historical carrying value of $ 270.4 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 December 31, 2021 and 2020, our cash and temporary investments were with high quality financial institutions in Demand Deposit Accounts, savings accounts and an interest-bearing checking account. Restricted investments included $ 24.3 million and $ 23.4 million as of December 31, 2021 and 2020, respectively, of mutual funds which are reported at fair value. These investments relate to the nonqualified deferred compensation plan that is described in Note 14 and insurance deposits. 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) or inputs, other than quoted prices in active markets, that are observable either directly or indirectly (Level 2), or unobservable inputs (Level 3). Cash and cash equivalents, accounts receivable, accounts payable and mutual funds and related liabilities are defined as “Level 1,” while long-term debt is defined as “Level 2” 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, 2021
Property Plant And Equipment [Abstract]
Property and Equipment	NOTE 9. Property and Equipment Property and equipment consist of the following (in thousands): December 31, 2021 2020 Land $ 24,724 $ 24,708 Building and improvements 36,617 36,649 Leasehold improvements 7,955 7,686 Computer equipment and software 156,169 145,139 Furniture and equipment 14,775 14,732 Transportation equipment 863,956 862,247 Construction in process 45,248 33,467 1,149,444 1,124,628 Less: Accumulated depreciation ( 467,993 ) ( 453,527 ) Property and Equipment, net $ 681,451 $ 671,101 Depreciation expense related to property and equipment was $ 95.5 million, $ 95.3 million and $ 89.5 million for the years ended December 31, 2021, 2020 and 2019 , respectively.

Long-Term Debt and Financing Ar

Long-Term Debt and Financing Arrangements	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Long-Term Debt and Financing Arrangements	NOTE 10. Long-Term Debt and Financing Arrangements On July 1, 2017, we entered into a five-year , $ 350 million unsecured credit agreement (the "Credit Agreement"). Borrowings under the Credit Agreement generally bear interest at a variable rate equal to (i) LIBOR plus a specified margin based upon Hub’s total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50 % or (c) the sum of 1 % plus one-month LIBOR ) plus a specified margin based upon the Total Net Leverage Ratio. The specified margin for Eurodollar loans varies from 100.0 to 200.0 basis points per annum. The specified margin for base rate loans varies from 0.0 to 100.0 basis points per annum. Hub must also pay (1) a commitment fee ranging from 10.0 to 25.0 basis points per annum (based upon the Total Net Leverage Ratio) on the aggregate unused commitments and (2) a letter of credit fee ranging from 100.0 to 200.0 basis points per annum (based upon the Total Net Leverage Ratio) on the undrawn amount of letters of credit. Refer to Note 17 "Subsequent Event" for information regarding the new credit agreement. We have standby letters of credit that expire in 2022 . As of December 31, 2021 , our letters of credit were $ 41.3 million. As of December 31, 2021 , we had no borrowings under the Credit Agreement and our unused and available borrowings were $ 308.7 million. We were in compliance with our debt covenants as of December 31, 2021. We have entered into various Equipment Notes (“Notes”) for the purchase of tractors, trailers, containers and refrigeration units. The Notes are secured by the underlying equipment financed in the agreements. Our outstanding Notes are as follows (in thousands): December 31, December 31, 2021 2020 Interim funding for equipment received and expected to be converted to an equipment note in subsequent year; interest paid at a variable rate $ 17,186 $ 8,902 Secured Equipment Notes due on various dates in 2026 commencing on various dates in 2021 ; interest is paid monthly at a fixed annual rate between 1.48 % and 2.41 % 94,766 - Secured Equipment Notes due on various dates in 2025 commencing on various dates in 2020 and 2021 ; interest is paid monthly at a fixed annual rate between 1.51 % and 1.80 % 63,308 74,494 Secured Equipment Notes due on various dates in 2024 commencing on various dates in 2017 , 2019 and 2020 ; interest is paid monthly at a fixed annual rate between 2.50 % and 3.59 % 34,432 49,920 Secured Equipment Notes due on various dates in 2023 commencing on various dates from 2016 to 2019 ; interest is paid monthly at a fixed annual rate between 2.20 % and 4.20 % 61,824 112,668 Secured Equipment Notes due on various dates in 2022 commencing on various dates from 2015 to 2017 ; interest is paid monthly at a fixed annual rate of between 2.20 % and 2.96 % 3,236 8,943 Secured Equipment Notes due on various dates in 2021 commencing on various dates from 2014 and 2016 ; interest is paid monthly at a fixed annual rate between 2.02 % and 2.96 % - 15,432 274,752 270,359 Less current portion ( 97,273 ) ( 93,562 ) Total long-term debt $ 177,479 $ 176,797 Aggregate principal payments, in thousands, due subsequent to December 31, 2021, are as follows: Year 1 $ 97,273 Year 2 72,971 Year 3 48,031 Year 4 37,257 Year 5 19,220 $ 274,752

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	NOTE 11. Leases The FASB issued ASC 842, Leases, (“ASC 842”) which requires lessees to recognize a right-of-use asset (“ROU”) and a lease obligation for all leases. We elected this option when we adopted the new standard using a modified retrospective transition method and recognized a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption rather than in the earliest period presented. In addition, we elected to apply a package of practical expedients and as such did 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 which we elected. As of December 31, 2021 , we recorded $ 45.3 million of ROU assets and $ 47.5 million of lease liabilities on our consolidated balance sheet. As of December 31, 2020 , we recorded $ 47.1 million of ROU assets and $ 48.2 million of Lease liabilities on our consolidated balance sheet. The lease liabilities recognized are measured based upon the present value of minimum future payments. The ROU assets are equal to lease liabilities upon initial recording, adjusted for prepaid and accrued rent balances which are recorded in the Consolidated Balance Sheets. Hub currently does not have any variable lease payments that depend on an index or a rate (such as the Consumer Price Index or a market interest rate). Some leases have options to extend or terminate the agreement, which management assesses in determining the estimated lease term. If any of the options to extend a lease are exercised, this change will be reflected as a remeasurement of the ROU asset and lease liability accordingly. As of December 31, 2021, the ROU asset and lease liabilities do not reflect any options to extend or terminate a lease as management is not reasonably certain it will exercise any of these options. Also, current leases do not contain any restrictions or covenants imposed by the leases or residual value guarantees. As of December 31, 2021 , Hub signed new property lease contracts which had not commenced. Based on the present value of the lease payments, the estimated ROU assets and lease liabilities related to these contracts will total approximately $ 1.6 million. Discount rates are not specified on the individual lease contracts at the commencement date. To determine the present value of the lease payments, Hub used its incremental borrowing rate which was determined based on Hub’s credit standing and factoring in the current 12-month LIBOR rate published at the time of the lease commencement. This incremental borrowing rate represents the rate of interest that Hub would have to pay to borrow on a collateralized basis over a similar term and amounts equal to the lease payments in a similar economic environment. The following table summarizes the lease costs (in thousands), which are included in transportation costs and general and administrative costs in the accompanying consolidated statement of income: Years Ended December 31, 2021 2020 2019 Amortization of finance right-of-use assets $ 2,304 $ 2,309 $ 2,326 Interest on finance lease liabilities 29 135 252 Finance lease cost 2,333 2,444 2,578 Operating lease cost 12,343 10,946 10,861 Short-term lease cost 171 238 289 Sublease income ( 327 ) ( 469 ) ( 507 ) Total lease cost $ 14,520 $ 13,159 $ 13,221 The following table represents the maturity of operating and finance lease liabilities (in thousands): December 31, 2021 Operating Leases Finance Leases Total Year 1 $ 12,253 $ 1,257 $ 13,510 Year 2 9,904 - 9,904 Year 3 8,133 - 8,133 Year 4 6,842 - 6,842 Year 5 5,320 - 5,320 Thereafter 6,436 - 6,436 Total 48,888 1,257 50,145 Imputed interest 2,608 6 2,614 Present value of lease payments 46,280 1,251 47,531 Less: current lease liabilities 11,364 1,251 12,615 Long-term lease liabilities $ 34,916 $ - $ 34,916 December 31, 2020 Operating Leases Finance Leases Total Year 1 $ 11,082 $ 1,817 $ 12,899 Year 2 9,714 8 9,722 Year 3 7,607 - 7,607 Year 4 6,369 - 6,369 Year 5 6,312 - 6,312 Thereafter 8,803 - 8,803 Total 49,887 1,825 51,712 Imputed interest 3,466 24 3,490 Present value of lease payments 46,421 1,801 48,222 Less: current lease liabilities 10,093 1,793 11,886 Long-term lease liabilities $ 36,328 $ 8 $ 36,336 The following table presents supplemental cash flow and noncash information related to leases: Years Ended December 31, 2021 2020 2019 Operating cash flows from operating leases $ 11,523 $ 9,419 $ 9,702 Financing cash flows from finance leases 2,682 3,066 2,954 Operating cash flows from finance leases 29 135 252 Cash paid for lease liabilities $ 14,234 $ 12,620 $ 12,908 Right-of-use assets obtained in exchange for new $ ( 72 ) $ ( 71 ) $ 6 financing lease liabilities (net of disposals) Rights-of-use assets obtained in exchange for new $ 11,684 $ 17,875 $ 13,242 operating lease liabilities (net of disposals) The weighted average remaining lease term and discount rates as of December 31, are as follows (in thousands): December 31, 2021 December 31, 2020 Weighted average remaining lease term — finance leases 0.6 years 0.6 years Weighted average remaining lease term — operating leases 5.11 years 5.61 years Weighted average discount rate — finance leases 1.56 % 3.88 % Weighted average discount rate — operating leases 2.14 % 2.64 %

Internal-Use Software

Internal-Use Software	12 Months Ended
	Dec. 31, 2021
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Internal-use Software	NOTE 12. Internal-Use Software We capitalize internal and external costs, which include costs related to the development of our cloud computing or hosting arrangements, incurred to develop internal use software per ASC Subtopic 350-40. Refer to Note 1 "Description of Business and Summary of Significant Accounting Policies" for information regarding accounting policy. We had total capitalized internal use software costs, which include costs related to the development of our cloud computing or hosting arrangements, net of accumulated amortization, of $ 58.7 million and $ 64.1 million as of December 31, 2021 and 2020, respectively. The 2021 balance consists of capitalized implementation costs of $ 12.4 million, net of accumulated amortization, related to our cloud hosting arrangements, which are classified in other assets in our consolidated balance sheet and capitalized internal-use software costs of $ 46.3 million, net of accumulated amortization, which are classified in property and equipment in our consolidated balance sheet. The 2020 balance consists of capitalized implementation costs of $ 13.9 million, net of accumulated amortization, related our cloud hosting arrangements, which are classified in other assets in our consolidated balance sheet and capitalized internal-use software costs of $ 50.2 million, net of accumulated amortization, which are classified in property and equipment in our consolidated balance sheet. We capitalized total implementation and internal-use software costs of $ 13.7 million and $ 12.7 million in 2021 and 2020 , respectively. Implementation and internal-use software costs are amortized, once ready for intended use, over its expected useful life or the term of the associated hosting arrangements of generally up to 10 years.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	12 Months Ended
	Dec. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation Plans	NOTE 13. Stock-Based Compensation Plans The 2017 Long-Term Incentive Plan (the “2017 Incentive Plan”) was approved by the Board of Directors and subsequently approved by the Company’s stockholders at the 2017 annual meeting. The 2017 Incentive Plan authorizes a broad range of awards including stock options, stock appreciation rights, restricted stock and restricted stock units, performance shares or units, other stock-based awards, and cash incentive awards to all employees (including the Company’s executive officers), directors, consultants, independent contractors or agents of us or a related company. The 2017 Incentive Plan is effective as of March 15, 2017. As of December 31, 2021 , 401,451 s hares were available for future grant under the 2017 Incentive Plan. We have awarded time-based restricted stock to our employees and the Company’s non-employee directors (“Outside Directors”). This restricted stock generally vests ratably (once per year) over a three to five-year period for recipients other than Outside Directors. Outside Directors’ restricted stock vests over a one-year period. In 2021, 2020 and 2019 we also granted performance-based restricted stock to our executive officers. The performance-based restricted stock vests upon the third anniversary of its issuance if certain financial targets are achieved. Share-based compensation expense for 2021, 2020 and 2019 was $ 20.1 million, $ 17.1 million and $ 16.3 million or $ 14.9 million, $ 13.1 million and $ 12.1 million, net of taxes, respectively. Included in the 2021, 2020 and 2019 share-based compensation expense was $ 5.8 million, $ 4.5 million and $ 3.4 million of performance-based share expenses o r $ 4.3 million, $ 3.5 million and $ 2.6 million, net of taxes, respectively. The fair value of non-vested restricted stock is equal to the market price of our stock at the date of grant. The following table summarizes the non-vested restricted stock activity for the year ended December 31, 2021: Time-Based Performance-Based Restricted Stock Restricted Stock Weighted Weighted Time-Based Average Performance-Based Average Restricted Stock Grant Date Restricted Stock Grant Date Shares Fair Value Shares Fair Value Non-vested January 1, 2021 792,483 $ 46.01 129,478 $ 45.64 Granted 534,580 $ 66.02 117,608 $ 50.60 Vested ( 303,995 ) $ 44.08 ( 76,000 ) $ 37.20 Forfeited ( 117,701 ) $ 48.48 ( 42,132 ) $ 47.77 Non-vested at December 31, 2021 905,367 $ 59.00 128,954 $ 54.45 The following table summarizes the restricted stock granted during the respective years: Time-based restricted stock grants 2021 2020 2019 Employees 510,017 312,855 355,579 Outside directors 24,563 26,341 32,262 Total 534,580 339,196 387,841 Weighted average grant date fair value $ 66.02 $ 52.07 $ 38.02 Vesting period 1 - 5 years 1 - 5 years 1 - 5 years The performance-based restricted stock granted in 2019 earned a 200 % award therefore an additional 38,000 shares were issued to settle the award on the vesting date of December 21, 2021 . The 2021 grant of performance-based restricted stock resulted in the issuance of 79,608 shares. The performance-based restricted stock grants were 75,288 in 2020 and 76,500 in 2019. The weighted average grant date fair value of these shares was $ 57.00 in 2021 , $ 51.07 in 2020 , and $ 37.20 in 2019. The total fair value of restricted shares vested during the years ended December 31, 2021, 2020 and 2019 was $ 25.4 million, $ 17.8 million and $ 14.7 million, respectively. As of December 31, 2021, 2020, and 2019, there was $ 45.5 million, $ 27.5 million and $ 27.4 million of unrecognized compensation cost related to non-vested time-based compensation, respectively, that is expected to be recognized over a weighted average period for 2021, 2020, and 2019 of 3.11 years, 2.47 years and 2.91 years, respectively. Additionally, as of December 31, 2021, 2020, and 2019 there was $ 6.5 million, $ 4.0 million and $ 3.7 million of unrecognized compensation cost, respectively, related to the non-vested performance-based restricted stock compensation that is expected to be recognized over a weighted average period of 1.5 years for 2021, 2020 and 2019.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2021
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	NOTE 14. Employee Benefit Plans We have a profit-sharing plan 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 $ 3.1 million related to this plan in 2021 and $ 3.3 million in each of 2020 and 2019. 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, which was amended in 2008, participants can elect to defer certain compensation. Accounts 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, 2021 and 2020. Both realized and unrealized gains and losses are included in income and expense and offset the change in the deferred compensation liabilit y. We provide a 50 % match on the first 6% of employee compensation deferred under the Plan which vests over three years with a maximum match equivalent to 3 % of base salary. We incurred expense of $ 0.3 million per year related to the employer match for these plans in 2021, 2020 and 2019. The liabilities related to these plans as of December 31, 2021 and 2020 were $ 24.1 million and $ 23.4 million, respectively.

Legal Matters

Legal Matters	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Legal Matters	NOTE 15. Legal Matters Robles and Adame O n January 25, 2013 , a complaint was filed in the United States District Court for the Eastern District of California by Salvador Robles against our subsidiary HGT. The action was brought on behalf of a putative class comprised of present and former California-based truck drivers who, from January 2009 to September 2014, were classified as independent contractors. The complaint included allegations that HGT misclassified these drivers as independent contractors, as well as various violations of the California Labor Code and that HGT engaged in unfair competition practices. In 2014, most of the subject drivers accepted settlements that were expensed in 2014 and paid. In 2015, the lawsuit was transferred to the United States District Court for the Western District of Tennessee. The complaint sought, 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 were only on behalf of Mr. Robles and not a putative class. On August 5, 2015, a suit was filed in state court in San Bernardino County, California on behalf of 63 named plaintiffs against HGT and five Company employees. Plaintiffs in the Adame litigation are represented by the same counsel as represents the plaintiffs in Robles. The Adame lawsuit alleges claims similar to those asserted in the Robles litigation and seeks monetary penalties under the California Private Attorneys General Act. In September 2019, the Company and the plaintiffs in the Robles and Adame matters agreed in principle to settle all claims in both lawsuits for $ 4.8 million, which the Company recorded in the third quarter of 2019 and is included in "Accrued other" current liabilities on the accompanying Consolidated Balance Sheet. The parties are finalizing the settlement agreements, which are subject to final court approval. The Company is involved in certain other claims and pending litigation arising from the normal conduct of business, including putative class-action lawsuits in which the plaintiffs are current and former California-based drivers who allege claims for unpaid wages, failure to provide meal and rest periods, failure to reimburse incurred business expenses and other items. Based on management's present knowledge, management does not believe that loss contingencies arising from these pending matters are likely to have a material adverse effect on the Company's overall financial position, operating results, or cash flows after taking into account any existing accruals. However, actual outcomes could be material to the Company's financial position, operating results, or cash flows for any particular period.

Stock Repurchase Plans

Stock Repurchase Plans	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Stock Repurchase Plans	NOTE 16. Stock Repurchase Plans On May 23, 2019, our Board of Directors authorized the purchase of up to $ 100 million of our Class A Common Stock. Under the program, the shares may be repurchased in the open market or in privately negotiated transactions, from time to time subject to market and other conditions. Other than fro m employee withholdings as described below, we did no t purchase any stock under this authorization during the year ended December 31, 2021 and 2020 . We purchased 626,320 shares for $ 25.0 million under this authorization from shareholders on the open market dur ing the year ended December 31, 2019. The approved share repurchase program does not obligate us to repurchase any dollar amount or number of shares and the program may be extended, modified, suspended, or discontinued at any time. We purchased 134,329 shares for $ 9.1 million during 2021 , 148,242 shares for $ 8.0 million during 2020 and 98,260 shares for $ 4.0 million in 2019 related to employee withholding upon vesting of restricted stock. The table below summarizes the number of shares delivered to us by employees to satisfy the mandatory tax withholding requirement upon vesting of restricted stock during 2021: 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) 1/1/2021 - 1/31/2021 63,349 $ 57.00 - $ - 2/1/2021 - 2/28/2021 2,630 $ 56.29 - $ - 3/1/2021 - 3/31/2021 - $ - - $ - 4/1/2021 - 4/30/2021 968 $ 66.89 - $ - 5/1/2021 - 5/31/2021 1,144 $ 66.50 - $ - 6/1/2021 - 6/30/2021 1,117 $ 65.24 - $ - 7/1/2021 - 7/31/2021 703 $ 65.48 - $ - 8/1/2021 - 8/31/2021 53 $ 67.38 - $ - 9/1/2021 - 9/30/2021 212 $ 69.85 - $ - 10/1/2021 - 10/31/2021 409 $ 77.76 - $ - 11/1/2021 - 11/30/2021 1,700 $ 82.28 - $ - 12/1/2021 - 12/31/2021 62,044 $ 79.18 - $ - Total 134,329 $ 67.91 - $ 75,002

Subsequent Event

Subsequent Event	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Event	NOTE 17. Subsequent Event In February 2022, we entered into a five year , $ 350 million unsecured credit agreement (the "Credit Agreement"). Borrowings under the Credit Agreement generally bear interest at a variable rate equal to (i) the secured overnight financing rate (published by the Federal Reserve Bank of New York, “SOFR”), plus a specified margin based on the term of such borrowing, plus a specified margin based upon Hub’s total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50 % or (c) the sum of 1 % and one-month SOFR ) plus a specified margin based upon the Total Net Leverage Ratio. The specified margin for SOFR loans varies from 100.0 to 175.0 basis points per annum. The specified margin for base rate loans varies from 0.0 to 75.0 basis points per annum. Hub must also pay (1) a commitment fee ranging from 10.0 to 25.0 basis points per annum (based upon the Total Net Leverage Ratio) on the aggregate unused commitments and (2) a letter of credit fee ranging from 100.0 to 175.0 basis points per annum (based upon the Total Net Leverage Ratio) on the undrawn amount of letters of credit.

VALUATION AND QUALIFYING ACCOUN

VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2021
Valuation And Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTS	HUB GROUP, INC. V ALUATION 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 2021 $ 8,280,000 $ 308,000 $ 11,510,000 $ ( 37,000 ) $ 20,061,000 2020 $ 6,910,000 $ 135,000 $ 1,242,000 $ ( 7,000 ) $ 8,280,000 2019 $ 6,728,000 $ 180,000 $ 5,000 $ ( 3,000 ) $ 6,910,000 Deferred tax valuation allowance Balance at Charged to Balance at Year Ended Beginning of Costs & End of December 31: Year Expenses Year 2021 $ 6,518,000 $ ( 1,495,000 ) $ 5,023,000 2020 $ 4,713,000 $ 1,805,000 $ 6,518,000 2019 $ 3,128,000 $ 1,585,000 $ 4,713,000 (1) Expected customer account adjustments charged to revenue and write-offs, net of recoveries. (2) Represents bad debt recoveries.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
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, 2021 and 2020 , our cash and temporary investments were with high quality financial institutions in demand deposit accounts (“DDAs”), savings accounts and an interest-bearing checking account.
Accounts Receivable and Allowance for Uncollectible Accounts	Accounts Receivable and Allowance for Uncollectible Accounts: On January 1, 2020, we adopted ASU 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASC 326), which replaces the incurred loss methodology with an expected loss methodology that is referred to as the Current Expected Credit Loss (“CECL”). The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including trade receivables. The impact of adopting the standard was immaterial. In accordance with the standard, trade receivables are reported at amortized cost net of the allowance for credit losses. The allowance for credit losses is a valuation account that is deducted from the trade receivables’ amortized cost basis to present the net amount expected to be collected on the receivables. Trade receivables are charged off against the allowance when we believe the uncollectibility of a receivable balance is confirmed, and the expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Management continuously reviews and assesses the environment, especially with the COVID-19 pandemic, and its potential impact on the credit worthiness and collectability of our accounts receivable with customers most affected by the COVID-19 pandemic. Our allowance for credit losses is presented in the allowance for uncollectible trade accounts and is immaterial at December 31, 2021 and 2020. The allowance for uncollectible trade accounts also includes estimated adjustments to revenue for items such as billing disputes. Our reserve for uncollectible accounts was approximately $ 20.1 million and $ 8.3 million as of December 31, 2021 and 2020 , 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 10 years; furniture and equipment, up to 10 years; and transportation equipment up to 16 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 10 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 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.
Capitalized Internal Use Software and Cloud Computing Costs	Capitalized Internal Use Software and Cloud Computing Costs: We capitalize internal and external costs, which include costs related to the development of our cloud computing or hosting arrangements, incurred to develop internal use software per ASC Subtopic 350-40. Internal use software has both the of the following characteristics: the software is acquired, internally developed, or modified solely to meet our needs and during the development or modification, no substantive plan exists or is being developed to market the software externally. Only costs incurred during the application development stage and costs to develop or obtain software that allows for access to or conversion of old data by new systems are capitalized. Capitalization of costs begins when the preliminary project stage is complete, management has committed to funding the project and it is probable the project will be completed, and the software will be used to perform its intended function. The measurement of the costs to capitalize include fees paid to third parties, costs incurred to obtain software from third parties, travel expenses incurred by employees in their duties associated with developing software, payroll related costs for employees who spend time directly on the project and interest costs incurred while developing internal-use software or implementing a hosting arrangement. Capitalization ceases no later than when the project is substantially complete and ready for its intended use, after all substantial testing is complete.
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 only have one reporting unit. We assess qualitative factors such as current company performance and overall economic factors to determine if it is more-likely-than-not that the fair value of our reporting unit was less than its carrying value 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 fair value of the reporting unit is less than the carrying amount, then a goodwill impairment charge will be recognized in the amount by which carrying amount exceeds fair value, limited to the total amount of goodwill allocated to that reporting unit. We performed our annual assessment in the fourth quarter of 2021 and 2020 as required and determined it was not more-likely-than-not that the fair value of our reporting unit was less than its carrying value. 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.
Claims Accruals	Claims Accruals: We purchase insurance coverage for a portion of expenses related to employee injuries, vehicular collisions, accidents, and cargo damage. Certain insurance arrangements include high self-insurance retention limits or deductibles applicable to each claim. We have umbrella policies to limit our exposure to large claim costs. Our claims accrual policy for all self-insured claims is to recognize a liability at the time of the incident based on our analysis of the nature and severity of the claims and analyses provided by third-party claims administrators, as well as legal and regulatory factors. Our safety and claims personnel work directly with representatives from the insurance companies to continually update the estimated cost of each claim. The ultimate cost of a claim develops over time as additional information regarding the nature, timing, and extent of damages claimed becomes available. Accordingly, we use an actuarial method to develop current claim information to derive an estimate of our ultimate claim liability. This process involves the use of loss-development factors based on our historical claims experience. In doing so, the recorded liability factors in future growth of claims and an allowance for incurred-but-not-reported claims. We do not discount our estimated losses. In addition, we record receivables for amounts expected to be reimbursed for payments made in excess of self-insurance levels on covered claims related to auto liability and workers’ compensation. At December 31, 2021 and 2020, we had an accrual of approximately $ 30.8 million and $ 32.1 million, respectively for estimated claims. We had no significant receivables recorded for payments in excess of our self-insu red levels. Our claims accruals are classified in accrued other and non-current liabilities in the consolidated balance sheets, based on when the claim is estimated to be paid.
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, savings accounts and an interest-bearing checking account. We primarily serve customers located throughout the United States with no significant concentration in any one region. In each of the years ended December 31, 2021 and 2020, one customer accounted for more than 10 % of our annual revenue. No one customer accounted for more than 10 % of our annual revenue for the year ended December 31, 2019. We revie w 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 : In accordance with the Accounting Standards Codification (ASC) topic 606, Revenue from Contracts with Customers our significant accounting policy for revenue is as follows: Revenue is recognized when we transfer services to our customer in an amount that reflects the consideration we expect to receive. 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. 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. 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 prices to our customers 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.
Provision for Income Taxes	Provision for Income Taxes: Significant judgment is required in determining and assessing the impact of complex tax laws and certain tax-related contingencies on our provision for income taxes. As part of our calculation of the provision for income taxes, we assess whether the benefits of our tax positions are at least more likely than not to be sustained upon audit based on the technical merits of the tax position. For tax positions that are not more likely than not to be sustained upon audit, we accrue the largest amount of the benefit that is not more likely than not to be sustained in our financial statements. Such accruals require us to make estimates and judgments, whereby actual results could vary materially from these estimates. Further, years may elapse before a particular matter for which we have established an accrual is audited and resolved or its statute of limitations expires. We recognize interest expense and penalties related to income tax liabilities in our provision for income taxes. Deferred income taxes are recognized for the future tax effects of temporary differences between financial statement 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 one exception. We have established a valuation allowance of $ 5.0 million related to federal and state tax credit carryforwards. In the event the probability of realizing the remaining deferred tax assets does not meet the more likely than not threshold in the future, a valuation allowance would be established for the deferred tax assets deemed unrecoverable.
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 restricted stock 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 and is included in salaries and benefits .
New Pronouncements	New Pronouncements: In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This ASU clarifies and simplifies accounting for income taxes by eliminating certain exceptions for intraperiod tax allocation principles, the methodology for calculating income tax rates in an interim period, and recognition of deferred taxes for outside basis difference in an investment, among other updates. The effective date of this ASU is for fiscal years and interim periods beginning after December 15, 2020. We adopted the standard as of January 1, 2021, but it did not have an impact on our financial statement.
Use of Estimates	Use of Estimates : The preparation of financial statements in conformity with United States 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 uncollectible trade accounts, exposure for self-insured claims under our insurance policies and useful lives of assets. Actual results could differ from these estimates.
Reclassifications	Reclassifications: Certain prior year immaterial amounts have been reclassified in Note 5, Revenue from Contracts with Customers, to conform with the current year presentation.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 2020 2019 Net income $ 171,474 $ 73,559 $ 107,171 Weighted average shares outstanding - basic 33,434 33,180 33,284 Dilutive effect of restricted stock 458 363 196 Weighted average shares outstanding - diluted 33,892 33,543 33,480 Earnings per share net income Basic $ 5.13 $ 2.22 $ 3.22 Diluted $ 5.06 $ 2.19 $ 3.20

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2021
Schedule of Amortization Expense	Amortization expense for the next five years is as follows (in thousands): Total Year 1 $ 25,329 Year 2 23,284 Year 3 21,126 Year 4 20,089 Year 5 17,389
Choptank Transport, LLC Member
Summarizes the Preliminary Allocation of Total Consideration to Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary allocation of the total consideration to the assets acquired and liabilities assumed as of the date of the acquisition (in thousands): October 19, 2021 Cash and cash equivalents $ 5,596 Accounts receivable trade 71,576 Prepaid expenses and other current assets 419 Property and equipment 169 Right of use assets - operating leases 872 Goodwill, net 54,553 Other intangibles 60,500 Total assets acquired $ 193,685 Accounts payable trade $ 60,970 Accrued payroll 3,458 Accrued other 519 Lease liability - operating leases short-term 311 Lease liability - operating leases long-term 561 Total liabilities assumed $ 65,819 Total consideration $ 127,866 Cash paid, net $ 122,270
Schedule of Components of Other Intangibles Acquired	The components of “Other intangibles” listed in the above table as of the acquisition date are preliminarily estimated as follows (in thousands): Accumulated Balance at Estimated Useful Amount Amortization December 31, 2021 Life Customer relationships $ 36,300 $ 605 $ 35,695 15 years Carrier network $ 14,400 $ 900 $ 13,500 4 years Developed technology $ 6,500 $ 232 $ 6,268 7 years Trade name $ 3,300 $ 550 $ 2,750 18 months
Schedule of Amortization Expense	Amortization expense related to Choptank for the next five years is as follows (in thousands): Total Year 1 $ 9,149 Year 2 7,499 Year 3 6,949 Year 4 6,049 Year 5 3,349
Nonstop Delivery ,LLC [Member]
Summarizes the Preliminary Allocation of Total Consideration to Assets Acquired and Liabilities Assumed	The following table summarizes the allocation of the total consideration to the assets acquired and liabilities assumed as of the date of the acquisition (in thousands): December 9, 2020 Cash and cash equivalents $ 4,775 Accounts receivable trade 25,927 Prepaid expenses and other current assets 207 Property and equipment 1,018 Right of use assets - operating leases 1,295 Goodwill, net 38,156 Other intangibles 47,700 Other assets 14 Total assets acquired $ 119,092 Accounts payable trade $ 9,972 Accrued payroll 1,324 Accrued other 578 Lease liability - operating leases short-term 373 Lease liability - operating leases long-term 922 Total liabilities assumed $ 13,169 Total consideration $ 105,923 Cash paid, net $ 84,989
Schedule of Components of Other Intangibles Acquired	The components of “Other intangibles” listed in the above table as of the acquisition date are estimated as follows (in thousands): Accumulated Balance at Estimated Useful Amount Amortization December 31, 2021 Life Customer relationships $ 46,200 $ 3,337 $ 42,863 15 years Trade name $ 900 $ 650 $ 250 18 months Agent relationships $ 600 $ 163 $ 437 4 years
Schedule of Unaudited Pro forma Consolidated Results of Operations	The following unaudited pro forma consolidated results of operations presents the effects of Choptank as though it had been acquired as of January 1, 2020 and NSD as though it had been acquired as of January 1, 2019 (in thousands, except for per share amounts): Years Ended December 31, 2021 December 31, 2020 December 31, 2019 Revenue $ 4,624,385 $ 3,887,189 $ 3,733,507 Net income $ 173,254 $ 79,578 $ 107,998 Earnings per share Basic $ 5.18 $ 2.40 $ 3.24 Diluted $ 5.11 $ 2.37 $ 3.23

Revenue from Contract with Cu_2

Revenue from Contract with Customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue From Contract With Customer [Abstract]
Summary of Disaggregated Revenue by Business Line	The following table summarizes our disaggregated revenue by business line (in thousands) for the years ended December 31: 2021 2020 2019 Intermodal $ 2,391,494 $ 2,029,186 $ 2,083,464 Logistics 887,388 767,279 852,113 Truck brokerage 688,867 431,127 433,793 Dedicated 264,634 268,052 298,747 Total revenue $ 4,232,383 $ 3,495,644 $ 3,668,117

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill	The following table presents the carrying amount of goodwill (in thousands): Goodwill Balance at December 31, 2019 $ 484,459 Acquisition $ 24,315 Other ( 219 ) Balance at December 31, 2020 $ 508,555 Acquisitions 68,395 Other ( 37 ) Balance at December 31, 2021 $ 576,913
Components of Other Intangible Assets	The components of the “Other intangible assets” are as follows (in thousands): Net Gross Accumulated Carrying Amount Amortization Value Life As of December 31, 2021: Customer relationships $ 226,623 $ ( 53,156 ) $ 173,467 5 - 15 years Carrier network and agent relationships $ 15,000 $ ( 1,063 ) $ 13,937 4 years Developed technology $ 6,500 $ ( 232 ) $ 6,268 7 years Trade name $ 5,500 $ ( 2,500 ) $ 3,000 18 months Total $ 253,623 $ ( 56,951 ) $ 196,672 Net Gross Accumulated Carrying Amount Amortization Value Life As of December 31, 2020: Customer relationships $ 196,806 $ ( 36,765 ) $ 160,041 5 - 15 years Carrier network and agent relationships $ 2,432 $ ( 51 ) $ 2,381 4 years Trade name $ 2,921 $ ( 1,390 ) $ 1,531 18 months Total $ 202,159 $ ( 38,206 ) $ 163,953
Schedule of Amortization Expense	Amortization expense for the next five years is as follows (in thousands): Total Year 1 $ 25,329 Year 2 23,284 Year 3 21,126 Year 4 20,089 Year 5 17,389

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 2020 2019 U.S. federal statutory rate 21.0 % 21.0 % 21.0 % State taxes, net of federal benefit 3.5 3.6 3.5 Federal and state incentives ( 0.5 ) ( 1.1 ) ( 0.9 ) State law changes 1.1 ( 0.2 ) 0.7 Permanent differences 0.6 0.2 1.2 Net effective rate 25.7 % 23.5 % 25.5 %
Summary of Provision for Income Taxes	The following is a summary of our provision for income taxes (in thousands): Years Ended December 31, 2021 2020 2019 Current Federal $ 51,918 $ 11,913 $ 31,209 State and local 13,876 3,597 3,979 Foreign 38 11 84 65,832 15,521 35,272 Deferred Federal ( 5,125 ) 6,548 ( 344 ) State and local ( 1,254 ) 465 1,788 Foreign ( 17 ) 7 ( 17 ) ( 6,396 ) 7,020 1,427 Total provision $ 59,436 $ 22,541 $ 36,699
Summary of Deferred Tax Assets and Liabilities	The following is a summary of our deferred tax assets and liabilities (in thousands): December 31, 2021 2020 Accrued compensation 19,226 12,467 Other reserves 17,896 14,154 Tax credit carryforwards 8,286 8,715 Operating loss carryforwards 881 2,845 Lease accounting liability 11,956 11,669 Total gross deferred income taxes 58,245 49,850 Valuation allowances ( 5,023 ) ( 6,518 ) Total deferred tax assets 53,222 43,332 Prepaids ( 6,607 ) ( 6,404 ) Property and equipment ( 135,768 ) ( 132,669 ) Intangibles ( 55,466 ) ( 55,166 ) Lease right-of-use asset ( 11,325 ) ( 11,418 ) Total deferred tax liabilities ( 209,166 ) ( 205,657 ) Total deferred taxes $ ( 155,944 ) $ ( 162,325 )
Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 2021 2020 Gross unrecognized tax benefits - beginning of the year $ 4,292 $ 4,069 Gross increases (decreases) related to prior year tax positions 997 ( 52 ) Gross increases related to current year tax positions 1,794 1,484 Lapse of applicable statute of limitations ( 436 ) ( 1,209 ) Gross unrecognized tax benefits - end of year $ 6,647 $ 4,292

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment consist of the following (in thousands): December 31, 2021 2020 Land $ 24,724 $ 24,708 Building and improvements 36,617 36,649 Leasehold improvements 7,955 7,686 Computer equipment and software 156,169 145,139 Furniture and equipment 14,775 14,732 Transportation equipment 863,956 862,247 Construction in process 45,248 33,467 1,149,444 1,124,628 Less: Accumulated depreciation ( 467,993 ) ( 453,527 ) Property and Equipment, net $ 681,451 $ 671,101

Long-Term Debt and Financing _2

Long-Term Debt and Financing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Outstanding Debt	Our outstanding Notes are as follows (in thousands): December 31, December 31, 2021 2020 Interim funding for equipment received and expected to be converted to an equipment note in subsequent year; interest paid at a variable rate $ 17,186 $ 8,902 Secured Equipment Notes due on various dates in 2026 commencing on various dates in 2021 ; interest is paid monthly at a fixed annual rate between 1.48 % and 2.41 % 94,766 - Secured Equipment Notes due on various dates in 2025 commencing on various dates in 2020 and 2021 ; interest is paid monthly at a fixed annual rate between 1.51 % and 1.80 % 63,308 74,494 Secured Equipment Notes due on various dates in 2024 commencing on various dates in 2017 , 2019 and 2020 ; interest is paid monthly at a fixed annual rate between 2.50 % and 3.59 % 34,432 49,920 Secured Equipment Notes due on various dates in 2023 commencing on various dates from 2016 to 2019 ; interest is paid monthly at a fixed annual rate between 2.20 % and 4.20 % 61,824 112,668 Secured Equipment Notes due on various dates in 2022 commencing on various dates from 2015 to 2017 ; interest is paid monthly at a fixed annual rate of between 2.20 % and 2.96 % 3,236 8,943 Secured Equipment Notes due on various dates in 2021 commencing on various dates from 2014 and 2016 ; interest is paid monthly at a fixed annual rate between 2.02 % and 2.96 % - 15,432 274,752 270,359 Less current portion ( 97,273 ) ( 93,562 ) Total long-term debt $ 177,479 $ 176,797
Summary of Aggregate Principal Payments	Aggregate principal payments, in thousands, due subsequent to December 31, 2021, are as follows: Year 1 $ 97,273 Year 2 72,971 Year 3 48,031 Year 4 37,257 Year 5 19,220 $ 274,752

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Summary of Lease Costs	The following table summarizes the lease costs (in thousands), which are included in transportation costs and general and administrative costs in the accompanying consolidated statement of income: Years Ended December 31, 2021 2020 2019 Amortization of finance right-of-use assets $ 2,304 $ 2,309 $ 2,326 Interest on finance lease liabilities 29 135 252 Finance lease cost 2,333 2,444 2,578 Operating lease cost 12,343 10,946 10,861 Short-term lease cost 171 238 289 Sublease income ( 327 ) ( 469 ) ( 507 ) Total lease cost $ 14,520 $ 13,159 $ 13,221
Schedule of Maturity of Operating and Finance Leases Liabilities	The following table represents the maturity of operating and finance lease liabilities (in thousands): December 31, 2021 Operating Leases Finance Leases Total Year 1 $ 12,253 $ 1,257 $ 13,510 Year 2 9,904 - 9,904 Year 3 8,133 - 8,133 Year 4 6,842 - 6,842 Year 5 5,320 - 5,320 Thereafter 6,436 - 6,436 Total 48,888 1,257 50,145 Imputed interest 2,608 6 2,614 Present value of lease payments 46,280 1,251 47,531 Less: current lease liabilities 11,364 1,251 12,615 Long-term lease liabilities $ 34,916 $ - $ 34,916 December 31, 2020 Operating Leases Finance Leases Total Year 1 $ 11,082 $ 1,817 $ 12,899 Year 2 9,714 8 9,722 Year 3 7,607 - 7,607 Year 4 6,369 - 6,369 Year 5 6,312 - 6,312 Thereafter 8,803 - 8,803 Total 49,887 1,825 51,712 Imputed interest 3,466 24 3,490 Present value of lease payments 46,421 1,801 48,222 Less: current lease liabilities 10,093 1,793 11,886 Long-term lease liabilities $ 36,328 $ 8 $ 36,336
Summary of Supplemental Cash Flow and Noncash Information	The following table presents supplemental cash flow and noncash information related to leases: Years Ended December 31, 2021 2020 2019 Operating cash flows from operating leases $ 11,523 $ 9,419 $ 9,702 Financing cash flows from finance leases 2,682 3,066 2,954 Operating cash flows from finance leases 29 135 252 Cash paid for lease liabilities $ 14,234 $ 12,620 $ 12,908 Right-of-use assets obtained in exchange for new $ ( 72 ) $ ( 71 ) $ 6 financing lease liabilities (net of disposals) Rights-of-use assets obtained in exchange for new $ 11,684 $ 17,875 $ 13,242 operating lease liabilities (net of disposals)
Summary Of Weighted Average Remaining Lease Term and Discount Rates	The weighted average remaining lease term and discount rates as of December 31, are as follows (in thousands): December 31, 2021 December 31, 2020 Weighted average remaining lease term — finance leases 0.6 years 0.6 years Weighted average remaining lease term — operating leases 5.11 years 5.61 years Weighted average discount rate — finance leases 1.56 % 3.88 % Weighted average discount rate — operating leases 2.14 % 2.64 %

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021: Time-Based Performance-Based Restricted Stock Restricted Stock Weighted Weighted Time-Based Average Performance-Based Average Restricted Stock Grant Date Restricted Stock Grant Date Shares Fair Value Shares Fair Value Non-vested January 1, 2021 792,483 $ 46.01 129,478 $ 45.64 Granted 534,580 $ 66.02 117,608 $ 50.60 Vested ( 303,995 ) $ 44.08 ( 76,000 ) $ 37.20 Forfeited ( 117,701 ) $ 48.48 ( 42,132 ) $ 47.77 Non-vested at December 31, 2021 905,367 $ 59.00 128,954 $ 54.45
Schedule of Restricted Stock Granted	The following table summarizes the restricted stock granted during the respective years: Time-based restricted stock grants 2021 2020 2019 Employees 510,017 312,855 355,579 Outside directors 24,563 26,341 32,262 Total 534,580 339,196 387,841 Weighted average grant date fair value $ 66.02 $ 52.07 $ 38.02 Vesting period 1 - 5 years 1 - 5 years 1 - 5 years

Stock Repurchase Plans (Tables)

Stock Repurchase Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Schedule of Number of Shares Purchased and Maximum Value of Shares that May Yet Be Purchased Under the Plan	The table below summarizes the number of shares delivered to us by employees to satisfy the mandatory tax withholding requirement upon vesting of restricted stock during 2021: 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) 1/1/2021 - 1/31/2021 63,349 $ 57.00 - $ - 2/1/2021 - 2/28/2021 2,630 $ 56.29 - $ - 3/1/2021 - 3/31/2021 - $ - - $ - 4/1/2021 - 4/30/2021 968 $ 66.89 - $ - 5/1/2021 - 5/31/2021 1,144 $ 66.50 - $ - 6/1/2021 - 6/30/2021 1,117 $ 65.24 - $ - 7/1/2021 - 7/31/2021 703 $ 65.48 - $ - 8/1/2021 - 8/31/2021 53 $ 67.38 - $ - 9/1/2021 - 9/30/2021 212 $ 69.85 - $ - 10/1/2021 - 10/31/2021 409 $ 77.76 - $ - 11/1/2021 - 11/30/2021 1,700 $ 82.28 - $ - 12/1/2021 - 12/31/2021 62,044 $ 79.18 - $ - Total 134,329 $ 67.91 - $ 75,002

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Reserve for uncollectible accounts	$ 20.1	$ 8.3
Accrual for estimated claims	30.8	$ 32.1
Federal and State [Member]
Summary Of Significant Accounting Policies [Line Items]
State and federal tax net operating losses, valuation allowance	$ 5
Software Development [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets estimated useful life	10 years
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] | Service [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	10 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	16 years

Capital Structure - Additional

Capital Structure - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
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	84
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 ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 171,474	$ 73,559	$ 107,171
Weighted average shares outstanding - basic	33,434	33,180	33,284
Dilutive effect of restricted stock	458	363	196
Weighted average shares outstanding - diluted	33,892	33,543	33,480
Earnings per share from continuing operations
Basic	$ 5.13	$ 2.22	$ 3.22
Diluted	5.06	2.19	3.20
Earnings per share net income
Basic	5.13	2.22	3.22
Diluted	$ 5.06	$ 2.19	$ 3.20

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) $ in Thousands	Oct. 19, 2021USD ($)	Dec. 09, 2020USD ($)Carrier	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Amortization expense of intangible assets				$ 18,700	$ 13,800
Revenue				4,232,383	3,495,644	$ 3,668,117
Operating income				238,457	105,826	$ 152,420
Post-Closing Activities			$ 100
Nonstop Delivery ,LLC [Member]
Business Acquisition [Line Items]
Business acquisition date		Dec. 9, 2020
Percentage of equity interests acquired		100.00%
Consideration for transaction		$ 105,900
Business acquisition, cash paid		89,800
Settlement of accounts receivable due from subsidiary		$ 16,100
Number of network carriers | Carrier		200
Goodwill and other intangible assets tax deductible, period		15 years
Amortization expense of intangible assets				$ 3,700
Intangible assets, weighted average useful life				13 years 8 months 23 days
Revenue				$ 10,200
Operating income				900
Nonstop Delivery ,LLC [Member] | General And Administrative Expense [Member]
Business Acquisition [Line Items]
Business acquisition, related costs					$ 1,000
Choptank Transport, LLC [Member]
Business Acquisition [Line Items]
Business acquisition date	Oct. 19, 2021
Percentage of equity interests acquired	100.00%
Consideration for transaction	$ 127,600
Settlement of accounts receivable due from subsidiary	$ 300
Goodwill and other intangible assets tax deductible, period	15 years
Amortization expense of intangible assets				$ 2,300
Intangible assets, weighted average useful life				10 years 8 months 12 days
Revenue				$ 112,200
Operating income				300
Restricted stock granted	$ 22,000
Choptank Transport, LLC [Member] | General And Administrative Expense [Member]
Business Acquisition [Line Items]
Business acquisition, related costs				$ 1,100

Acquisitions - Summarizes the P

Acquisitions - Summarizes the Preliminary Allocation of Total Consideration to Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Oct. 19, 2021	Dec. 09, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill, net			$ 576,913	$ 508,555	$ 484,459
Operating Lease Liability Current			11,364	10,093
Lease liability - operating leases			34,916	36,328
Cash paid, net			$ 122,360	$ 84,845	$ 734
Choptank Transport, LLC [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 5,596
Accounts receivable trade	71,576
Prepaid expenses and other current assets	419
Property and equipment	169
Right of use assets - operating leases	872
Goodwill, net	54,553
Other intangibles	60,500
Total assets acquired	193,685
Accounts payable trade	60,970
Accrued payroll	3,458
Accrued other	519
Lease liability - operating leases short-term	311
Lease liability - operating leases	561
Total liabilities assumed	65,819
Total consideration	127,866
Cash paid, net	$ 122,270
Nonstop Delivery ,LLC [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		$ 4,775
Accounts receivable trade		25,927
Prepaid expenses and other current assets		207
Property and equipment		1,018
Right of use assets - operating leases		1,295
Goodwill, net		38,156
Other intangibles		47,700
Other assets		14
Total assets acquired		119,092
Accounts payable trade		9,972
Accrued payroll		1,324
Accrued other		578
Lease liability - operating leases short-term		373
Lease liability - operating leases		922
Total liabilities assumed		13,169
Total consideration		105,923
Cash paid, net		$ 84,989

Acquisitions - Schedule of Comp

Acquisitions - Schedule of Components of Other Intangibles Acquired (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 253,623	$ 202,159
Finite-lived intangible assets, Accumulated Amortization	56,951	38,206
Finite-lived intangible assets, Net Carrying Value	196,672	163,953
Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	226,623	196,806
Finite-lived intangible assets, Accumulated Amortization	53,156	36,765
Finite-lived intangible assets, Net Carrying Value	173,467	160,041
Developed Technology [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	6,500
Finite-lived intangible assets, Accumulated Amortization	232
Finite-lived intangible assets, Net Carrying Value	$ 6,268
Intangible assets estimated useful life	7 years
Trade Name [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 5,500	2,921
Finite-lived intangible assets, Accumulated Amortization	2,500	1,390
Finite-lived intangible assets, Net Carrying Value	$ 3,000	$ 1,531
Intangible assets estimated useful life	18 months	18 months
Choptank Transport, LLC [Member] | Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 36,300
Finite-lived intangible assets, Accumulated Amortization	605
Finite-lived intangible assets, Net Carrying Value	$ 35,695
Intangible assets estimated useful life	15 years
Choptank Transport, LLC [Member] | Carrier Network [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 14,400
Finite-lived intangible assets, Accumulated Amortization	900
Finite-lived intangible assets, Net Carrying Value	$ 13,500
Intangible assets estimated useful life	4 years
Choptank Transport, LLC [Member] | Developed Technology [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 6,500
Finite-lived intangible assets, Accumulated Amortization	232
Finite-lived intangible assets, Net Carrying Value	$ 6,268
Intangible assets estimated useful life	7 years
Choptank Transport, LLC [Member] | Trade Name [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 3,300
Finite-lived intangible assets, Accumulated Amortization	550
Finite-lived intangible assets, Net Carrying Value	$ 2,750
Intangible assets estimated useful life	18 months
Nonstop Delivery ,LLC [Member] | Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 46,200
Finite-lived intangible assets, Accumulated Amortization	3,337
Finite-lived intangible assets, Net Carrying Value	$ 42,863
Intangible assets estimated useful life	15 years
Nonstop Delivery ,LLC [Member] | Trade Name [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 900
Finite-lived intangible assets, Accumulated Amortization	650
Finite-lived intangible assets, Net Carrying Value	$ 250
Intangible assets estimated useful life	18 months
Nonstop Delivery ,LLC [Member] | Agent Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 600
Finite-lived intangible assets, Accumulated Amortization	163
Finite-lived intangible assets, Net Carrying Value	$ 437
Intangible assets estimated useful life	4 years

Acquisition - Schedule of Amort

Acquisition - Schedule of Amortization Expense (Detail) $ in Thousands	Dec. 31, 2021USD ($)
Finite-Lived Intangible Assets [Line Items]
Year 1	$ 25,329
Year 2	23,284
Year 3	21,126
Year 4	20,089
Year 5	17,389
Choptank Transport, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Year 1	9,149
Year 2	7,499
Year 3	6,949
Year 4	6,049
Year 5	$ 3,349

Acquisitions - Schedule of Unau

Acquisitions - Schedule of Unaudited Pro forma Consolidated Results of Operations (Detail) - Nonstop Delivery ,LLC [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Revenue	$ 4,624,385	$ 3,887,189	$ 3,733,507
Net income	$ 173,254	$ 79,578	$ 107,998
Earnings per share
Basic	$ 5.18	$ 2.40	$ 3.24
Diluted	$ 5.11	$ 2.37	$ 3.23

Revenue from Contracts with Cus

Revenue from Contracts with Customers - Additional Information (Detail)	Dec. 31, 2021DriversAgents
Dedicated Carrier [Member]
Revenue From Contracts With Customers [Line Items]
Number of Drivers Employed | Drivers	1,100
Logistics [Member]
Revenue From Contracts With Customers [Line Items]
Number Of Network Agents | Agents	200

Summary of Disaggregated Revenu

Summary of Disaggregated Revenue by Business Line (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenue	$ 4,232,383	$ 3,495,644	$ 3,668,117
Intermodal [Member]
Disaggregation Of Revenue [Line Items]
Revenue	2,391,494	2,029,186	2,083,464
Logistics [Member]
Disaggregation Of Revenue [Line Items]
Revenue	887,388	767,279	852,113
Truck brokerage [Member]
Disaggregation Of Revenue [Line Items]
Revenue	688,867	431,127	433,793
Dedicated [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 264,634	$ 268,052	$ 298,747

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Intangible Assets [Line Items]
Goodwill accumulated impairment loss	$ 0
Amortization expense of intangible assets	$ 18,700	$ 13,800
Weighted Average [Member]
Intangible Assets [Line Items]
Weighted average life of definite lived intangible assets	10 years 3 months 18 days	10 years 11 months 23 days

Carrying Amount of Goodwill (De

Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Beginning Balance	$ 508,555	$ 484,459
Acquisition	68,395	24,315
Other	(37)	(219)
Goodwill, Ending Balance	$ 576,913	$ 508,555

Components of Other Intangible

Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 253,623	$ 202,159
Finite-lived intangible assets, Accumulated Amortization	(56,951)	(38,206)
Finite-lived intangible assets, Net Carrying Value	196,672	163,953
Customer Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	226,623	196,806
Finite-lived intangible assets, Accumulated Amortization	(53,156)	(36,765)
Finite-lived intangible assets, Net Carrying Value	$ 173,467	$ 160,041
Customer Relationships [Member] | Minimum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	5 years	5 years
Customer Relationships [Member] | Maximum [Member]
Other Intangible Assets [Line Items]
Intangible assets estimated useful life	15 years	15 years
Carrier Network and Agent Relationships [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 15,000	$ 2,432
Finite-lived intangible assets, Accumulated Amortization	(1,063)	(51)
Finite-lived intangible assets, Net Carrying Value	$ 13,937	$ 2,381
Intangible assets estimated useful life	4 years	4 years
Developed Technology [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 6,500
Finite-lived intangible assets, Accumulated Amortization	(232)
Finite-lived intangible assets, Net Carrying Value	$ 6,268
Intangible assets estimated useful life	7 years
Trade Name [Member]
Other Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Amount	$ 5,500	$ 2,921
Finite-lived intangible assets, Accumulated Amortization	(2,500)	(1,390)
Finite-lived intangible assets, Net Carrying Value	$ 3,000	$ 1,531
Intangible assets estimated useful life	18 months	18 months

Amortization Expense (Detail)

Amortization Expense (Detail) $ in Thousands	Dec. 31, 2021USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Year 1	$ 25,329
Year 2	23,284
Year 3	21,126
Year 4	20,089
Year 5	$ 17,389

Reconciliation of Effective Tax

Reconciliation of Effective Tax Rate to Federal Statutory Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
United States federal statutory rate	21.00%	21.00%	21.00%
State taxes, net of federal benefit	3.50%	3.60%	3.50%
Federal and state incentives	(0.50%)	(1.10%)	(0.90%)
State law changes	1.10%	(0.20%)	0.70%
Permanent differences	0.60%	0.20%	1.20%
Net effective rate	25.70%	23.50%	25.50%

Summary of Provision for Income

Summary of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal	$ 51,918	$ 11,913	$ 31,209
State and local	13,876	3,597	3,979
Foreign	38	11	84
Current income tax expense, total	65,832	15,521	35,272
Deferred
Federal	(5,125)	6,548	(344)
State and local	(1,254)	465	1,788
Foreign	(17)	7	(17)
Deferred income tax expense, total	(6,396)	7,020	1,427
Total provision	$ 59,436	$ 22,541	$ 36,699

Summary of Deferred Tax Assets

Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Accrued compensation	$ 19,226	$ 12,467
Other reserves	17,896	14,154
Tax credit carryforwards	8,286	8,715
Operating loss carryforwards	881	2,845
Lease accounting liability	11,956	11,669
Total gross deferred income taxes	58,245	49,850
Valuation allowances	(5,023)	(6,518)
Total deferred tax assets	53,222	43,332
Prepaids	(6,607)	(6,404)
Property and equipment	(135,768)	(132,669)
Intangibles	(55,466)	(55,166)
Lease right-of-use asset	(11,325)	(11,418)
Total deferred tax liabilities	(209,166)	(205,657)
Total deferred taxes	$ (155,944)	$ (162,325)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Operating loss carryforwards	$ 881	$ 2,845
Valuation allowances	5,023	6,518
Incentive tax credit carryforwards	8,286	8,715
Unrecognized tax benefits	6,647	4,292	$ 4,069
Potential increase (decrease) in income tax provision	5,400	3,700
Possible increase in unrecognized tax benefits resulting from audit settlements	100
CaseStack, Inc. [Member] | Internal Revenue Service [Member]
Income Taxes [Line Items]
Operating loss carryforwards	1,300	$ 1,300	$ 1,300
Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards	200
Incentive tax credit carryforwards	100
Federal [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards				$ 4,100
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards	600
Incentive tax credit carryforwards	8,200
State [Member] | Tax Incentive Credit Carryforwards [Member]
Income Taxes [Line Items]
Valuation allowances	3,400
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 5,000
Minimum [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2022
Minimum [Member] | Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2025
Minimum [Member] | State [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2022
Maximum [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2040
Maximum [Member] | Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2028
Maximum [Member] | State [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2026

Unrecognized Tax Benefits (Deta

Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits - beginning of the year	$ 4,292	$ 4,069
Gross increases related to prior year tax positions	997
Gross (decreases) related to prior year tax positions		(52)
Gross increases related to current year tax positions	1,794	1,484
Lapse of applicable statute of limitations	(436)	(1,209)
Gross unrecognized tax benefits - end of year	$ 6,647	$ 4,292

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021
Fair Value Measurement [Line Items]
Carrying value of debt	$ 270,359	$ 274,752
Restricted investments	23,400	24,300
Fixed-rate Borrowings [Member]
Fair Value Measurement [Line Items]
Increase (decrease) in fair value of debt	6,100
Carrying value of debt	$ 270,400	$ 274,800

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 1,149,444	$ 1,124,628
Less: Accumulated depreciation	(467,993)	(453,527)
Property and Equipment, net	681,451	671,101
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	24,724	24,708
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	36,617	36,649
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	7,955	7,686
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	156,169	145,139
Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	14,775	14,732
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	863,956	862,247
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 45,248	$ 33,467

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Depreciation	$ 95.5	$ 95.3	$ 89.5

Long-Term Debt and Financing _3

Long-Term Debt and Financing Arrangements - Additional Information (Detail) - USD ($) $ in Millions	Jul. 01, 2017	Dec. 31, 2021
Letter of Credit [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Commitment fee on unused commitments	1.00%
Letter of Credit [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Commitment fee on unused commitments	2.00%
Standby Letters of Credit [Member]
Line Of Credit Facility [Line Items]
Letters of credit expiration, year		2022
Outstanding letters of credit		$ 41.3
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Amount of credit agreement	$ 350
Term of credit agreement	5 years
Credit agreement interest rate description		(i) LIBOR plus a specified margin based upon Hub’s total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50% or (c) the sum of 1% plus one-month LIBOR) plus a specified margin based upon the Total Net Leverage Ratio.
Borrowings under bank revolving line of credit		$ 0
Unused and available borrowings under bank revolving line of credit and credit agreement		$ 308.7
Credit Agreement [Member] | Federal Funds Rate [Member]
Line Of Credit Facility [Line Items]
Interest rate under the credit agreement	0.50%
Credit Agreement [Member] | LIBOR rate [Member]
Line Of Credit Facility [Line Items]
Interest rate under the credit agreement	1.00%
Description of variable rate basis		one-month LIBOR
Credit Agreement [Member] | Eurodollar
Line Of Credit Facility [Line Items]
Interest rate under the credit agreement	2.00%
Credit Agreement [Member] | Base Rate
Line Of Credit Facility [Line Items]
Interest rate under the credit agreement	1.00%
Credit Agreement [Member] | Minimum [Member]
Line Of Credit Facility [Line Items]
Commitment fee on unused commitments	0.10%
Credit Agreement [Member] | Maximum [Member]
Line Of Credit Facility [Line Items]
Commitment fee on unused commitments	0.25%

Schedule of Outstanding Debt (D

Schedule of Outstanding Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Interim funding for equipment received and expected to be converted to an equipment note in subsequent year; interest paid at a variable rate	$ 17,186	$ 8,902
Secured long-term debt	274,752	270,359
Less current portion	(97,273)	(93,562)
Total long-term debt	177,479	176,797
Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Secured long-term debt	94,766
Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Secured long-term debt	63,308	74,494
Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Secured long-term debt	34,432	49,920
Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Secured long-term debt	61,824	112,668
Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Secured long-term debt	$ 3,236	8,943
Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Secured long-term debt		$ 15,432

Schedule of Outstanding Debt (P

Schedule of Outstanding Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2021
Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2026
Payment Frequency	monthly
Secured Equipment Notes due in 2026 [Member] | Commencing on 2021 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2021
Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2025
Payment Frequency	monthly
Secured Equipment Notes due in 2025 [Member] | Commencing on 2021 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2021
Secured Equipment Notes due in 2025 [Member] | Commencing on 2020 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2020
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 2020 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2020
Secured Equipment Notes due in 2024 [Member] | Commencing on 2019 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2019
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 2021 [Member]
Debt Instrument [Line Items]
Equipment notes due period	2021
Payment Frequency	monthly
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 2021 [Member] | Commencing on 2016 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2016
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 2019 [Member]
Debt Instrument [Line Items]
Equipment notes, date of first required payment	2019
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 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
Minimum [Member] | Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.48%
Minimum [Member] | Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.51%
Minimum [Member] | Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.50%
Minimum [Member] | Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.02%
Minimum [Member] | Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.20%
Minimum [Member] | Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.20%
Maximum [Member] | Secured Equipment Notes due in 2026 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.41%
Maximum [Member] | Secured Equipment Notes due in 2025 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	1.80%
Maximum [Member] | Secured Equipment Notes due in 2024 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	3.59%
Maximum [Member] | Secured Equipment Notes due in 2021 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.96%
Maximum [Member] | Secured Equipment Notes due in 2023 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	4.20%
Maximum [Member] | Secured Equipment Notes due in 2022 [Member]
Debt Instrument [Line Items]
Interest rate secured debt	2.96%

Summary of Aggregate Principal

Summary of Aggregate Principal Payments (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Year 1	$ 97,273
Year 2	72,971
Year 3	48,031
Year 4	37,257
Year 5	19,220
Secured long-term debt	$ 274,752	$ 270,359

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lease And Rental Expense [Line Items]
Right-of-use asset	$ 45.3	$ 47.1
Lease liability	47.5	$ 48.2
ASU No. 2016-02 [Member]
Lease And Rental Expense [Line Items]
Estimated ROU assets and lease liabilities	$ 1.6

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Amortization of finance right-of-use assets	$ 2,304	$ 2,309	$ 2,326
Interest on finance lease liabilities	29	135	252
Finance lease cost	2,333	2,444	2,578
Operating lease cost	12,343	10,946	10,861
Short-term lease cost	171	238	289
Sublease income	(327)	(469)	(507)
Total lease cost	$ 14,520	$ 13,159	$ 13,221

Leases - Schedule of Maturity o

Leases - Schedule of Maturity of Operating and Finance Leases Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Finance Lease Liability, Year 1	$ 1,257	$ 1,817
Finance Lease Liability, Year 2		8
Finance Lease Liability, Year 3		0
Finance Lease Liability, Year 4		0
Finance Lease Liability, Year 5		0
Finance Lease Liability, Thereafter		0
Finance Leases Liability, Total	1,257	1,825
Finance Leases Liability, Imputed interest	6	24
Finance Leases Liability, Present value of lease payments	1,251	1,801
Less: Finance Leases Liability, current lease liabilities	1,251	1,793
Finance Leases Liability, Long-term lease liabilities	0	8
Total Lease Liability, Year 1	13,510	12,899
Total Lease Liability, Year 2	9,904	9,722
Total Lease Liability, Year 3	8,133	7,607
Total Lease Liability, Year 4	6,842	6,369
Total Lease Liability, Year 5	5,320	6,312
Total Lease Liability, Thereafter	6,436	8,803
Total Leases Liability	50,145	51,712
Total Leases Liability, Imputed interest	2,614	3,490
Total Leases Liability, Present value of lease payments	47,531	48,222
Less: Total Leases Liability, current lease liabilities	12,615	11,886
Total Leases Liability, Long-term lease liabilities	34,916	36,336
Operating Leases Liability, Year 1	12,253	11,082
Operating Leases Liability, Year 2	9,904	9,714
Operating Leases Liability, Year 3	8,133	7,607
Operating Leases Liability, Year 4	6,842	6,369
Operating Leases Liability, Year 5	5,320	6,312
Operating Leases Liability, Thereafter	6,436	8,803
Operating Leases Liability, Total	48,888	49,887
Operating Leases Liability, Imputed interest	2,608	3,466
Operating Leases Liability, Present value of lease payments	46,280	46,421
Less: Operating Leases Liability, Current lease liabilities	11,364	10,093
Operating Leases Liability, Long-term lease liabilities	$ 34,916	$ 36,328

Leases - Summary of Supplementa

Leases - Summary of Supplemental Cash Flow and Noncash Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 11,523	$ 9,419	$ 9,702
Financing cash flows from finance leases	2,682	3,066	2,954
Operating cash flows from finance leases	29	135	252
Cash paid for lease liabilities	14,234	12,620	12,908
Right-of-use assets obtained in exchange for new financing lease liabilities (net of disposals)	(72)	(71)	6
Rights-of-use assets obtained in exchange for new operating lease liabilities (net of disposals)	$ 11,684	$ 17,875	$ 13,242

Leases - Summary of Weighted Av

Leases - Summary of Weighted Average Remaining Lease Term and Discount Rates (Detail)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted average remaining lease term — finance leases	7 months 6 days	7 months 6 days
Weighted average remaining lease term — operating leases	5 years 1 month 9 days	5 years 7 months 9 days
Weighted average discount rate — finance leases	1.56%	3.88%
Weighted average discount rate — operating leases	2.14%	2.64%

Internal-Use Software - Additio

Internal-Use Software - Additional Information (Detail) - Revision of Prior Period, Accounting Standards Update, Adjustment [Member] - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Capitalized internal use software costs and implementation costs net of accumulated amortizations	$ 58,700,000	$ 64,100,000
Capitalized implementation and internal-use software costs during the period	$ 13,700,000	12,700
Maximum [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Capitalized implementation and internal-use software costs amortization period	10 years
Property and Equipment, Net [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Capitalized internal use software costs and implementation costs net of accumulated amortizations	$ 46,300,000	50,200,000
Other Assets [Member]
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Line Items]
Capitalized internal use software costs and implementation costs net of accumulated amortizations	$ 12,400,000	$ 13,900,000

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to share-based compensation plans		$ 20,100,000	$ 17,100,000	$ 16,300,000
Compensation expense related to share-based compensation plans, net of tax		$ 14,900,000	$ 13,100,000	$ 12,100,000
Time Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants		534,580	339,196	387,841
Restricted stock grants, Weighted average grant date fair value		$ 66.02	$ 52.07	$ 38.02
Unrecognized compensation cost related to non-vested share-based compensation		$ 45,500,000	$ 27,500,000	$ 27,400,000
Unrecognized compensation cost weighted average period recognized (years)		3 years 1 month 9 days	2 years 5 months 19 days	2 years 10 months 28 days
Time Based Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		1 year	1 year	1 year
Time Based Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		5 years	5 years	5 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to share-based compensation plans		$ 5,800,000	$ 4,500,000	$ 3,400,000
Compensation expense related to share-based compensation plans, net of tax		$ 4,300,000	3,500,000	2,600,000
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock performance shares earned		200.00%
Additional restricted shares issued		38,000
Restricted stock vesting date		Dec. 21, 2021
Restricted stock grants		117,608
Restricted stock grants, Weighted average grant date fair value		$ 50.60
Unrecognized compensation cost related to non-vested share-based compensation		$ 6,500,000	$ 4,000,000	$ 3,700,000
Unrecognized compensation cost weighted average period recognized (years)		1 year 6 months	1 year 6 months	1 year 6 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants, Weighted average grant date fair value	$ 84.24
Total fair value of restricted shares vested		$ 25,400	$ 17,800,000	$ 14,700,000
2017 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant		401,451
Employees [Member] | Time Based Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		3 years
Employees [Member] | Time Based Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period		5 years
Employees [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	3 years
Restricted stock grants	51,794
Employees [Member] | Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants		79,608	75,288	76,500
Restricted stock grants, Weighted average grant date fair value		$ 57	$ 51.07	$ 37.20
Employees [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	5 years
Restricted stock grants	198,051
Employees [Member] | Time Based Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants	129,632
Outside Directors [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	1 year
Restricted stock grants	16,625

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans - Schedule of Non-Vested Restricted Stock Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Time Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value Non-vested, Beginning balance	$ 46.01
Weighted average grant date fair value, Granted	66.02	$ 52.07	$ 38.02
Weighted average grant date fair value, Vested	44.08
Weighted average grant date fair value, Forfeited	48.48
Weighted average grant date fair value Non-vested, Ending balance	$ 59	$ 46.01
Shares Non-vested, Beginning balance	792,483
Shares, Granted	534,580	339,196	387,841
Shares, Vested	(303,995)
Shares, Forfeited	(117,701)
Shares Non-vested, Ending balance	905,367	792,483
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value Non-vested, Beginning balance	$ 45.64
Weighted average grant date fair value, Granted	50.60
Weighted average grant date fair value, Vested	37.20
Weighted average grant date fair value, Forfeited	47.77
Weighted average grant date fair value Non-vested, Ending balance	$ 54.45	$ 45.64
Shares Non-vested, Beginning balance	129,478
Shares, Granted	117,608
Shares, Vested	(76,000)
Shares, Forfeited	(42,132)
Shares Non-vested, Ending balance	128,954	129,478

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans - Restricted Stock Granted (Detail) - Time Based Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants	534,580	339,196	387,841
Restricted stock grants, Weighted average grant date fair value	$ 66.02	$ 52.07	$ 38.02
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	1 year	1 year	1 year
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock vesting period	5 years	5 years	5 years
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants	510,017	312,855	355,579
Outside Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock grants	24,563	26,341	32,262

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Expenses related to employer contributions	$ 3.1	$ 3.3	$ 3.3
Expenses related to deferred compensation plan	0.3	0.3	$ 0.3
Deferred compensation liability	$ 24.1	$ 23.4
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 Info

Legal Matters - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2019
Robles Lawsuits [Member]
Loss Contingencies [Line Items]
Complaint filed date	January 25, 2013
Robles and Adame Lawsuits | Accrued Other [Member]
Loss Contingencies [Line Items]
Claims settlement recorded in consolidated balance sheet		$ 4.8

Stock Repurchase Plans - Additi

Stock Repurchase Plans - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended												12 Months Ended
	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	May 23, 2019
Equity Class Of Treasury Stock [Line Items]
Purchase of treasury shares (in shares)	62,044	1,700	409	212	53	703	1,117	1,144	968	0	2,630	63,349	134,329
Purchase of treasury shares															$ 24,998
Class A Common Stock [Member]
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount																$ 100,000
Purchase of treasury shares (in shares)													0	0	626,320
Purchase of treasury shares															$ 25,000
Class A Common Stock [Member] | Employee Restricted Stock Plan [Member]
Equity Class Of Treasury Stock [Line Items]
Purchase of treasury shares													$ 9,100	$ 8,000	$ 4,000
Stock tendered for payments of withholding taxes (in shares)													134,329	148,242	98,260

Stock Repurchase Plans - Schedu

Stock Repurchase Plans - Schedule of Number of Shares Purchased and Maximum Value of Shares that May Yet Be Purchased Under the Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended												12 Months Ended
	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Dec. 31, 2021
Equity Class Of Treasury Stock [Line Items]
Total Number of Shares Purchased	62,044	1,700	409	212	53	703	1,117	1,144	968	0	2,630	63,349	134,329
Average Price Paid Per Share	$ 79.18	$ 82.28	$ 77.76	$ 69.85	$ 67.38	$ 65.48	$ 65.24	$ 66.50	$ 66.89	$ 0	$ 56.29	$ 57	$ 67.91
Maximum Value of Shares that May Yet Be Purchased Under the Plan	$ 75,002												$ 75,002

Subsequent Event - Additional I

Subsequent Event - Additional Information (Details) - USD ($) $ in Millions	Feb. 28, 2022	Jul. 01, 2017	Dec. 31, 2021
Minimum [Member] | Letter Of Credit [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments		1.00%
Maximum [Member] | Letter Of Credit [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments		2.00%
Credit Agreement [Member]
Subsequent Event [Line Items]
Term of credit agreement		5 years
Amount of credit agreement		$ 350
Credit agreement interest rate description			(i) LIBOR plus a specified margin based upon Hub’s total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50% or (c) the sum of 1% plus one-month LIBOR) plus a specified margin based upon the Total Net Leverage Ratio.
Credit Agreement [Member] | Minimum [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments		0.10%
Credit Agreement [Member] | Maximum [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments		0.25%
Credit Agreement [Member] | Federal Funds Rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement		0.50%
Credit Agreement [Member] | LIBOR rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement		1.00%
Description of variable rate basis			one-month LIBOR
Credit Agreement [Member] | Base Rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement		1.00%
Subsequent Event [Member] | Minimum [Member] | Letter Of Credit [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments	1.00%
Subsequent Event [Member] | Maximum [Member] | Letter Of Credit [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments	1.75%
Subsequent Event [Member] | Base Rate [Member] | Minimum [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments	0.10%
Subsequent Event [Member] | Base Rate [Member] | Maximum [Member]
Subsequent Event [Line Items]
Commitment fee on unused commitments	0.25%
Subsequent Event [Member] | Credit Agreement [Member]
Subsequent Event [Line Items]
Term of credit agreement	5 years
Amount of credit agreement	$ 350
Credit agreement interest rate description	(i) the secured overnight financing rate (published by the Federal Reserve Bank of New York, “SOFR”), plus a specified margin based on the term of such borrowing, plus a specified margin based upon Hub’s total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50% or (c) the sum of 1% and one-month SOFR) plus a specified margin based upon the Total Net Leverage Ratio.
Subsequent Event [Member] | Credit Agreement [Member] | Federal Funds Rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	0.50%
Subsequent Event [Member] | Credit Agreement [Member] | Secured Overnight Financing Rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	1.00%
Description of variable rate basis	one-month SOFR
Subsequent Event [Member] | Credit Agreement [Member] | Secured Overnight Financing Rate [Member] | Minimum [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	1.00%
Subsequent Event [Member] | Credit Agreement [Member] | Secured Overnight Financing Rate [Member] | Maximum [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	1.75%
Subsequent Event [Member] | Credit Agreement [Member] | Base Rate [Member] | Minimum [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	0.00%
Subsequent Event [Member] | Credit Agreement [Member] | Base Rate [Member] | Maximum [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	0.75%

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Uncollectible Trade Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 8,280,000	$ 6,910,000	$ 6,728,000
Charged to Costs & Expenses		308,000	135,000	180,000
Charged to Other Accounts	[1]	11,510,000	1,242,000	5,000
Deductions	[2]	(37,000)	(7,000)	(3,000)
Balance at End of Year		20,061,000	8,280,000	6,910,000
Deferred tax valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		6,518,000	4,713,000	3,128,000
Charged to Costs & Expenses		1,495,000	1,805,000	1,585,000
Balance at End of Year		$ 5,023,000	$ 6,518,000	$ 4,713,000
[1]	Expected customer account adjustments charged to revenue and write-offs, net of recoveries.
[2]	Represents bad debt recoveries.