Stock-based Compensation Expense and Share Repurchase Programs - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	$ 85,420	$ 85,532	$ 268,898	$ 246,104
Stock-based compensation expense related to inventories	(536)	91	(1,236)	(454)
Share-based compensation expense by type of award	85,420	85,532	268,898	246,104
Income tax effect	(21,996)	3,114	(87,638)	(13,715)
Total stock-based compensation included in costs and expenses, net of tax	63,424	88,646	181,260	232,389
Cost of sales
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	1,337	1,259	4,178	3,263
Research and development expenses
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	52,504	52,918	167,851	153,018
Sales, general and administrative expenses
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	31,579	31,355	96,869	89,823
Restricted stock and restricted stock units (including PSUs)
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	61,175	55,482	185,651	157,397
Type of award:
Unrecognized Expense	409,425		$ 409,425
Weighted-average Recognition Period			2 years 3 months 7 days
Stock options
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	21,737	27,234	$ 76,053	81,880
Type of award:
Unrecognized Expense	153,686		$ 153,686
Weighted-average Recognition Period			2 years 7 months 20 days
ESPP share issuances
Stock-based compensation expense:
Total stock-based compensation included in costs and expenses	3,044	$ 2,725	$ 8,430	$ 7,281
Type of award:
Unrecognized Expense	$ 3,321		$ 3,321
Weighted-average Recognition Period			14 days