Debt - Summary of Long Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Capital leases and car loans	$ 12,504	$ 10,542
Total Debt	102,816	107,192
Less: Debt issuance costs	(1,772)	(1,768)
Less: Current portion of long-term debt	(10,207)	(8,989)
Total Long-Term Debt, net	90,837	96,435
Term Loan Facility
Debt Instrument [Line Items]
Long-term debt	70,312	71,250
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 20,000	$ 25,400