Stock-based Compensation Expense (Tables)

3 Months Ended

Mar. 31, 2012

Stock-based Compensation Expense

Stock-based compensation expense by award type and line item

	Three Months Ended March 31,
	2012			2011
	(in thousands)
Stock-based compensation expense by type of award:
Stock options	$	18,222		$	19,624
Restricted stock and restricted stock units		7,286			6,830
ESPP share issuances		2,430			1,579
Less stock-based compensation expense capitalized to inventories		(250	)		(154	)
Total stock-based compensation expense included in costs and expenses	$	27,688		$	27,879
Stock-based compensation expense by line item:
Research and development expenses	$	17,204		$	18,549
Sales, general and administrative expenses		10,484			9,330
Total stock-based compensation expense included in costs and expenses	$	27,688		$	27,879

Unrecognized stock-based compensation expense, net of estimated forfeitures

	As of March 31, 2012
	Unrecognized Expense Net of Estimated Forfeitures		Weighted-average Recognition Period
	(in thousands)		(in years)
Type of award:
Stock options	$	165,361		2.93
Restricted stock and restricted stock units		51,004		2.72
ESPP share issuances		2,892		0.49

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		2,352		2.98	$	15.52		2,352	$	15.52
$20.01–$30.00		1,793		6.73		29.05		1,304		28.80
$30.01–$40.00		16,299		7.53		36.10		8,660		35.23
$40.01–$50.00		403		8.75		44.42		92		44.53
$50.01–$57.27		2,026		9.20		52.18		413		52.82