Debt - Schedule of Maturities of Long Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Long-term Debt, by Current and Noncurrent [Abstract]
Less: Debt issuance costs	$ (1,080)	$ (1,768)
Capital Lease Obligations
Less: Interest on capital leases	(754)
Total Long-Term Debt
Remainder of 2018	3,235
2019	14,600
2020	12,114
2021	82,204
Long-term Debt and Capital Lease Obligations	112,153
Total Debt	111,399	107,192
Less: Current portion of long-term debt	(13,892)	(8,989)
Total Long-Term Debt, net	96,427	$ 96,435
Term Loan And Revolving Credit Facility
Long-term Debt, by Current and Noncurrent [Abstract]
Remainder of 2018	1,313
2019	7,873
2020	7,873
2021	81,002
Long-term Debt	98,061
Long-term debt	98,061
Less: Current portion of long-term debt	(7,217)
Less: Debt issuance costs	(1,080)
Long-term debt, net	89,764
Capital Lease Obligations and Car loans
Long-term Debt, by Current and Noncurrent [Abstract]
Less: Debt issuance costs	0
Capital Lease Obligations
Remainder of 2018	1,922
2019	6,727
2020	4,241
2021	1,202
Capital Lease Obligations	14,092
Less: Interest on capital leases	(754)
Capital Lease Obligations	13,338
Less: Current portion of long-term debt	(6,675)
Long-term portion of capital leases	$ 6,663