Stock-based Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2012

Stock-based Compensation Expense

Stock-based compensation expense by award type and line item

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	22,683		$	23,903		$	40,905		$	43,527
Restricted stock and restricted stock units		7,253			6,835			14,539			13,665
ESPP share issuances		1,742			1,523			4,172			3,102
Less stock-based compensation expense capitalized to inventories		(299	)		(382	)		(549	)		(536	)
Total stock-based compensation expense included in costs and expenses	$	31,379		$	31,879		$	59,067		$	59,758
Stock-based compensation expense by line item:
Research and development expenses	$	19,777		$	20,453		$	36,981		$	39,002
Sales, general and administrative expenses		11,602			11,426			22,086			20,756
Total stock-based compensation expense included in costs and expenses	$	31,379		$	31,879		$	59,067		$	59,758

Unrecognized stock-based compensation expense, net of estimated forfeitures

	As of June 30, 2012
	Unrecognized Expense Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	152,789		2.78
Restricted stock and restricted stock units		53,914		2.59
ESPP share issuances		2,298		0.51

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		1,273		3.27	$	15.57		1,273	$	15.57
$20.01–$30.00		1,484		6.79		29.22		1,035		28.99
$30.01–$40.00		13,413		7.42		36.11		6,815		35.09
$40.01–$50.00		345		8.81		44.28		51		44.59
$50.01–$60.00		2,191		9.11		53.14		591		54.73
$60.01–$64.30		65		9.89		63.10		—		n/a