Acquisitions - Additional Information (Detail) $ in Thousands			3 Months Ended	12 Months Ended
	Oct. 19, 2021 USD ($)	Dec. 09, 2020 USD ($) Carrier	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
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. 09, 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