Stock-based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2012

Stock-based Compensation Expense

Stock-based compensation expense by award type and line item

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	18,869		$	20,610		$	59,774		$	64,137
Restricted stock and restricted stock units		7,104			7,878			21,643			21,543
ESPP share issuances		1,948			1,220			6,120			4,322
Less stock-based compensation expense capitalized to inventories		(339	)		(294	)		(888	)		(830	)
Total stock-based compensation expense included in costs and expenses	$	27,582		$	29,414		$	86,649		$	89,172
Stock-based compensation expense by line item:
Research and development expenses	$	17,444		$	18,652		$	54,425		$	57,654
Sales, general and administrative expenses		10,138			10,762			32,224			31,518
Total stock-based compensation expense included in costs and expenses	$	27,582		$	29,414		$	86,649		$	89,172

Unrecognized stock-based compensation expense, net of estimated forfeitures

	As of September 30, 2012
	Unrecognized Expense Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	174,454		2.87
Restricted stock and restricted stock units		62,039		2.73
ESPP share issuances		1,176		0.34

Stock options outstanding and exercisable

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted-average Remaining Contractual Life		Weighted-average Exercise Price		Number Exercisable		Weighted-average Exercise Price
	(in thousands)		(in years)		(per share)		(in thousands)		(per share)
$  9.07–$20.00		1,163		3.21	$	15.53		1,163	$	15.53
$20.01–$30.00		1,434		6.60		29.29		1,023		29.08
$30.01–$40.00		12,882		7.17		36.10		7,204		35.18
$40.01–$50.00		2,327		9.61		48.11		70		44.55
$50.01–$60.00		2,355		8.97		53.37		691		54.43
$60.01–$64.30		65		9.63		63.10		4		63.10