Property and Equipment - Summary of Net Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 217,955	$ 198,284
Less accumulated depreciation and amortization	(107,170)	(88,376)
Total net property and equipment	110,785	109,908
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	7,054	7,368
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	82,768	67,268
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	54,094	53,021
Office and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	53,413	51,542
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	14,707	12,628
Property under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	3,217	3,217
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,702	$ 3,240