Components of Company Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 32,181	$ 42,007
Tax credit carryforwards	508,560	466,066
Accrued expenses, reserves, and prepaids	61,807	55,041
Intangible assets	29,413	18,734
Stock-based compensation	42,873	35,966
Lease liabilities	11,470
Inventory	6,290	12,859
Other	575	278
Valuation allowance	(86,197)	(107,928)
Total deferred tax assets	606,972	523,023
Joint venture basis difference	(993)	(1,010)
Acquired intangibles	(1,647)	(6,508)
Deferred revenue	(3,003)	(4,480)
Convertible notes discount	(2,364)	(5,157)
ROU assets	10,258
Property, plant and equipment	(46,642)	(44,916)
Total deferred tax liabilities	(64,907)	(62,071)
Net deferred tax assets	$ 542,065	$ 460,952