Long-term Debt - Schedule of Maturities of Long-term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Term loans, in effect, net of unamortized debt issuance costs of $447 and $249, respectively	$ 95,803	$ 47,876
Vehicle and equipment notes, maturing September 2021; payable in various monthly installments, including interest rates ranging from 2% to 4%	38,186	21,091
Various notes payable, maturing through March 2025; payable in various monthly installments, including interest rates ranging from 4% to 6%	4,988	4,529
Total long term debt	151,427	123,235
Total long term debt	151,427	123,235
Less: current maturities	(17,192)	(10,021)
Long-term debt, less current maturities	134,235	113,214
Delayed Draw [Member]
Debt Instrument [Line Items]
Delayed draw term loans, in effect, net of unamortized debt issuance costs of $50 and $261, respectively	$ 12,450	$ 49,739