Stock-based Compensation Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock-based compensation expense:
Less stock-based compensation expense capitalized to inventories	$ (456)	$ (204)	$ (905)	$ (885)
Total stock-based compensation expense included in costs and expenses	46,136	31,197	135,160	103,585
Total stock-based compensation expense included in costs and expenses			135,160	103,933
Stock options
Stock-based compensation expense:
Stock-based compensation expense by type of award:	26,291	18,899	78,403	68,285
Type of award:
Unrecognized Expense, Net of Estimated Forfeitures	180,746		180,746
Weighted-average Recognition Period			2 years 3 months 11 days
Restricted stock and restricted stock units
Stock-based compensation expense:
Stock-based compensation expense by type of award:	18,418	10,998	51,431	30,108
Type of award:
Unrecognized Expense, Net of Estimated Forfeitures	116,900		116,900
Weighted-average Recognition Period			2 years 3 months 7 days
ESPP share issuances
Stock-based compensation expense:
Stock-based compensation expense by type of award:	1,883	1,504	6,231	6,077
Type of award:
Unrecognized Expense, Net of Estimated Forfeitures	1,978		1,978
Weighted-average Recognition Period			5 months 5 days
Research and development expenses
Stock-based compensation expense:
Total stock-based compensation expense included in costs and expenses	31,131	19,155	91,284	64,100
Sales, general and administrative expenses
Stock-based compensation expense:
Total stock-based compensation expense included in costs and expenses	$ 15,005	$ 12,042	$ 43,876	$ 39,485
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Maximum percent of employees eligible for partial or full acceleration of equity awards (percent)	5.00%		5.00%