Other Current Liabilities - Schedule of Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Accrued accounts payable	$ 25,466	$ 24,119
Accrued compensation liability	23,517	22,554
Accrued restructuring liability	3,404	4,987
Other current liabilities	25,381	24,094
Total other current liabilities	$ 77,768	$ 75,754