Preferred Stock, Common Stock and Equity Plans (Tables)

12 Months Ended

Dec. 31, 2011

Preferred Stock, Common Stock and Equity Plans

Stock and Stock Option Equity Plans

			As of December 31, 2011
Title of Plan	Group Eligible	Type of Award Granted	Awards Outstanding		Additional Awards Authorized for Grant
2006 Stock and Option Plan	Employees, Non-employee Directors and Consultants	NSO, ISO, RS and RSU		19,889,776		8,631,417
1996 Stock and Option Plan	Employees, Non-employee Directors, Advisors and Consultants	NSO, ISO and RS		3,177,457		—
Total				23,067,233		8,631,417

Outstanding and vested options

	Stock Options			Weighted-average Exercise Price		Weighted-average Remaining Contractual Life		Aggregate Intrinsic Value
	(in thousands)			(per share)		(in years)		(in thousands)
Outstanding at December 31, 2010		21,293		$	30.50
Granted		5,754			43.55
Exercised		(4,119	)		26.60
Forfeited		(1,554	)		36.78
Expired		(451	)		37.81
Outstanding at December 31, 2011		20,923		$	34.23		6.84	$	56,376
Exercisable at December 31, 2011		12,225		$	30.59		5.55	$	53,552
Total exercisable or expected to vest at December 31, 2011		19,922		$	33.94		6.74	$	56,108

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		2,751		2.99	$	15.52		2,689	$	15.44
$20.01–$30.00		1,902		6.71	$	28.89		1,363	$	28.61
$30.01–$40.00		13,790		7.16	$	35.70		7,804	$	35.17
$40.01–$50.00		403		9.04	$	44.53		69	$	44.54
$50.01–$57.27		2,077		9.47	$	52.17		300	$	53.12

Restricted stock activity

	Restricted Stock			Weighted-average Grant-date Fair Value
	(in thousands)			(per share)
Unvested at December 31, 2010		1,931		$	33.35
Granted		1,185			41.04
Vested		(747	)		33.97
Cancelled		(269	)		36.01
Unvested at December 31, 2011		2,100		$	37.13

Shares issued under Employee Stock Purchase Plan

	Year Ended December 31, 2011
	(in thousands, except per share amount)
Number of shares		557
Average price paid per share	$	27.47