Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]

Summary Of Stock Option Activity

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (1)
Options outstanding at December 31, 2010		5,041,303		$	17.39
Granted		595,364		$	19.71
Exercised		(1,106,403	)	$	14.22
Forfeited		(228,456	)	$	20.79
Options outstanding at December 31, 2011		4,301,808		$	18.34		6.9	$	119.4
Vested and exercisable as of December 31, 2011		2,739,718		$	16.72		5.9	$	80.5

(1) The aggregate intrinsic value is calculated as the pre-tax difference between the exercise price of the underlying awards and the closing stock price per share of $46.11 of the Company's common stock on December 30, 2011. The amount is presented in millions.

Schedule Of Value Of Options Vested And Exercised

	Years Ended December 31,
	2011		2010		2009
Intrinsic value of options exercised	$	22,238	$	8,584	$	6,208
Grant-date fair value of options vested	$	12,608	$	13,730	$	11,653

Summary Of Restricted Stock Units

	Number of Shares			Weighted- Average Grant-Date Fair Value
Unvested at December 31, 2010		173,119		$	14.23
Vested		(51,606	)	$	14.37
Forfeited		(19,896	)	$	13.29
Unvested at December 31, 2011		101,617		$	14.35

Schedule Of Performance Share Awards

	Base Case Achievement				Upside Case Achievement
	Minimum		Maximum		Minimum		Maximum
Performance shares eligible to be earned		10,419		31,254		20,834		62,500

Schedule Of Stock-Based Compensation Expense

	Years Ended December 31,
	2011		2010		2009
Stock-based compensation expense recognized as:
Research and development expense	$	5,795	$	7,629	$	5,664
Selling, general and administrative expense		8,090		5,901		5,062
Total	$	13,885	$	13,530	$	10,726

Employees And Directors [Member]

Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]

Schedule Of Black-Scholes Assumptions Used For Stock Options

	Years Ended December 31,
	2011		2010		2009
Risk-free interest rate		1.02-2.34%		1.48-2.39%		1.71-2.87%
Estimated term (in years)		5.6-6.0		6.0		6.0
Estimated volatility		71-86%		71-72%		72–88%
Estimated dividend yield		None		None		None
Weighted-average grant-date fair value per share of options granted	$	13.75	$	9.64	$	23.04

Stock Appreciation Rights [Member]

Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]

Schedule Of Black-Scholes Assumptions Used For Stock Appreciation Rights Awards

Risk-free interest rate		1.07	%
Estimated term (in years)		5.6
Estimated volatility		71	%
Estimated dividend yield		None
Weighted-average grant-date fair value per share of stock appreciation rights granted	$	29.81