Other Long-Term Liabilities - Components of Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Product liability	$ 85,192	$ 118,941
Long-term income taxes payable	29,463	0
Stock-based liabilities	14,365	20,336
Other	15,197	17,647
Other long-term liabilities	$ 144,217	$ 156,924