Schedule of Inventory (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 49,871	$ 51,250
Work-in-process	204,379	167,788
Finished goods	129,893	136,088
Total inventory	$ 384,143	$ 355,126	[1]

[1] December 31, 2016 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2016, filed with the Securities and Exchange Commission (the SEC) on February 27, 2017.