Acquisitions - Summarizes the Preliminary Allocation of Total Consideration to Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands			12 Months Ended
	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