Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 1,124,628	$ 1,033,711
Less: Accumulated depreciation and amortization	(453,527)	(370,546)
Property and Equipment, net	671,101	663,165
Land [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	24,708	24,708
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	36,649	36,602
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	7,686	7,300
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	145,139	132,413
Furniture And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	14,732	14,057
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	862,247	800,300
Construction In Progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 33,467	$ 18,331

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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