Schedule of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Accounts payable and accrued operating expenses	$ 191,353	$ 179,294
Accrued compensation expense	109,038	95,345
Accrued rebates payable	34,737	32,553
Accrued royalties payable	15,151	10,412
Value added taxes payable	7,848	6,377
Accrued income taxes	0	59,572
Other	12,378	8,958
Total accounts payable and accrued liabilities	$ 370,505	$ 392,511