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