Employee Stock-Based Compensation and Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Share-based Compensation [Abstract]

Detail Of The Total Stock-Based Compensation Recognized By Income Statement Classification

The detail of the total stock-based compensation recognized by income statement classification is as follows (in thousands):

Income Statement Classifications	2011		2010		2009
Cost of services revenues	$	1,584	$	1,363	$	1,868
Research and development	31,763		54,123		55,012
Sales, marketing and services	31,354		28,704		32,244
General and administrative	28,208		19,568		22,295
Total	$	92,909	$	103,758	$	111,419

Schedule of Stock Option Activity

A summary of the status and activity of the Company’s fixed option awards is as follows:

Options	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2010	11,668,907		$	37.31	3.21
Granted	3,158,617		76.02
Assumed	572,883		12.32
Exercised	(3,944,381	)	31.84
Forfeited or expired	(756,121	)	53.61
Outstanding at December 31, 2011	10,699,905		48.06		3.24	$	186,254
Vested or expected to vest	10,128,946		47.34		3.18	$	181,099
Exercisable at December 31, 2011	4,782,143		34.23		2.20	$	128,380

Assumptions Used To Value Option Grants

The assumptions used to value option grants under the 2005 Plan are as follows:

	Stock options granted during
	2011	2010	2009
Expected volatility factor	0.38 - 0.50	0.31 - 0.37	0.34 - 0.44
Approximate risk free interest rate	0.6% - 1.1%	0.9% - 1.6%	1.2% - 1.6%
Expected term (in years)	3.27 - 3.91	3.06 - 3.27	3.17 - 3.37
Expected dividend yield	0%	0%	0%

Schedule of Nonvested Stock Unit Activity

The following table summarizes the Company's non-vested stock unit activity for the year ended December 31, 2011:

	Number of Shares		Weighted- Average Fair Value at Grant Date
Non-vested stock units at December 31, 2010	1,172,312		$	40.86
Granted	1,666,793		72.33
Vested	(527,933	)	40.33
Forfeited	(171,344	)	54.69
Non-vested stock units at December 31, 2011	2,139,828		64.05

Schedule Of Restricted Stock Unit Awards Activity

The following table summarizes the Company’s restricted stock unit awards for the year ended December 31, 2011:

	Number of Shares		Weighted- Average Fair Value at Grant Date
Restricted stock unit awards at December 31, 2010	175,667		$	24.16
Granted	—		—
Forfeited	(14,000	)	24.16
Restricted stock unit awards at December 31, 2011	161,667		24.16