Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued compensation	$ 15,455	$ 13,521
Accrued income tax and sales tax	332	1,513
Customer deposits	3,204	1,758
Interest payable	273	58
Provision for forward loss reserves	4,780	11,925
Other	5,235	7,683
Total	$ 29,279	$ 36,458