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Long-term Debt - Schedule of Maturities of Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
Term loans, in effect, net of unamortized debt issuance costs of $5,146 and $447, respectively $ 293,354 $ 95,803
Delayed draw term loans, in effect, net of unamortized debt issuance costs of $0 and $50, respectively   12,450
Vehicle and equipment notes, maturing December 2022; payable in various monthly installments, including interest rates ranging from 2% to 4.5% 50,357 38,186
Various notes payable, maturing through March 2025; payable in various monthly installments, including interest rates ranging from 4% to 6% 3,866 4,988
Total long term debt 347,577 151,427
Total long term debt 347,577 151,427
Less: current maturities (16,650) (17,192)
Long-term debt, less current maturities $ 330,927 $ 134,235