Accrued Liabilities - Summary of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued wages, bonuses and commissions	$ 38,996	$ 32,006
Other accrued liabilities	16,993	17,150
Accrued liabilities	$ 55,989	$ 49,156