Earnings (Loss) Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings (Loss) Per Share [Abstract]

Computation Of Basic And Diluted Earnings/Loss Per Common Share

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
Numerator:
Net income (loss), basic	$	(17,653	)	$	217,334	$	(27,101	)	$	218,008
Interest expense on convertible debt		0			2,599		0			7,797
Amortization of deferred offering costs related to the convertible debt		0			411		0			1,232
Net income (loss), diluted	$	(17,653	)	$	220,344	$	(27,101	)	$	227,037
Denominator (in thousands of common shares):
Basic weighted-average shares outstanding		112,290			102,110		111,358			101,660
Effect of dilutive securities:
Stock options		0			2,103		0			2,095
Potentially issuable restricted common stock		0			171		0			171
Potentially issuable common stock for ESPP purchases					551		0			552
Common stock issuable under convertible debt		0			26,343		0			26,343
Fully diluted weighted-average shares		112,290			131,278		111,358			130,821
Basic earnings (loss) per common share	$	(0.16	)	$	2.13	$	(0.24	)	$	2.14
Diluted earnings (loss) per common share	$	(0.16	)	$	1.68	$	(0.24	)	$	1.74

Potential Shares Of Common Stock

		00000000		00000000		00000000		00000000
	Three Months Ended September 30,				Nine Months Ended September 30,
	2011		2010		2011		2010
Options to purchase common stock		16,674		13,561		16,674		13,569
Common stock issuable under convertible debt		17,372		0		17,372		0
Unvested restricted stock units		1,033		251		1,001		251
Potentially issuable common stock for ESPP purchases		326		0		312		0
Common stock issued to the Nonqualified Deferred Compensation Plan		173		115		173		115
Total		35,578		13,927		35,532		13,935