Employee Stock and Savings Plans (Tables)

12 Months Ended

Jan. 31, 2012

Summary Stock Option Activity

Stock options outstanding, the weighted average exercise price, and transactions involving the stock option plans are summarized as follows:

	Options Outstanding			Weighted Average Exercise Price		Weighted Average Remaining Contractual Terms (Years)		Aggregate Intrinsic Value
Balance as of January 31, 2009		20,597		$	13.19		5.33	$	8
Granted		970			7.90
Assumed in acquisition		285			9.19
Exercised		(259	)		7.08
Forfeited		(246	)		10.10
Expired		(2,365	)		13.23
Balance as of January 31, 2010		18,982		$	12.98		3.75	$	10,347
Granted		508			10.14
Assumed in acquisition		2,160			5.05
Exercised		(1,640	)		5.27
Forfeited		(84	)		7.23
Expired		(1,114	)		16.86
Exchanged		(6,945	)		16.77
Balance as of January 31, 2011		11,867		$	9.94		5.35	$	44,780
Granted		517			10.70
Exercised		(2,227	)		6.82
Forfeited		(126	)		7.79
Expired		(844	)		18.38
Balance as of January 31, 2012		9,187		$	10.00		5.18	$	39,303
Options exercisable as of January 31, 2012		7,428		$	10.38		4.48	$	29,647
Options vested as of January 31, 2012 and options expected to vest after January 31, 2012		9,187		$	10.00		5.18	$	39,303

Total Intrinsic Value of Options Exercised and Cash Received from Options Exercised

The total intrinsic value of options exercised and cash received from options exercised was as follows:

Year ended January 31,	2012		2011		2010
Intrinsic value	$	15,802	$	7,812	$	511
Cash received	$	15,194	$	8,639	$	1,830

Summary of Restricted Stock Activity

The following table summarizes restricted stock activity:

	Restricted Stock Units			Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Nonvested as of January 31, 2010		226		$	9.46		2.26	$	1,816
Granted		1,990			9.61
Vested		(58	)		9.56
Cancelled		(27	)		8.52
Nonvested as of January 31, 2011		2,131		$	9.61		1.72	$	27,130
Granted		2,236			10.91
Vested		(634	)		9.31
Cancelled		(137	)		10.46
Nonvested as of January 31, 2012		3,596		$	10.71		1.77	$	49,881

Summary of Shares Issued Under the ESPPs

The following table summarizes shares issued under the ESPPs:

Year ended January 31,	2012		2011		2010
Shares issued under the ESPPs		2,099		3,461		4,143
Cash received for the purchase of shares under the ESPPs	$	22,155	$	19,019	$	18,237
Weighted average purchase price per share	$	10.55	$	5.50	$	4.40

Summary Of The Weighted Average Grant Date Fair Values

The weighted average grant date fair values are summarized as follows:

Year ended January 31,	2012		2011		2010
Options granted	$	5.43	$	5.02	$	4.06
Restricted stock units granted	$	10.91	$	9.61	$	8.78
ESPP purchase rights	$	3.19	$	2.17	$	2.77

Calculation For Fair Value assumptions

The fair value calculations used the following assumptions:

Year ended January 31,	2012		2011		2010
Stock Option Plans
Risk-free interest rate		1.2%		1.4% -2.6%		2.3% -3.1%
Dividend yield		0%		0%		0%
Expected life (in years)		6.3		5.5 - 6.5		5.0 - 6.5
Volatility (range)		53%		50% - 55%		45% - 55%
Volatility (weighted average)		53%		51%		51%

Year ended January 31,	2012		2011		2010
Employee Stock Purchase Plans
Risk-free interest rate		0.05% -0.18%		0.2%		0.2% -1.0%
Dividend yield		0%		0%		0%
Expected life (in years)		0.5		0.5		1.3
Volatility (range)		32% - 38%		38% -64%		46% - 72%
Volatility (weighted average)		35%		40%		56%

Year ended January 31,	2012		2011		2010
Acquired Company Options Exchange
Risk-free interest rate		—		0.1% -3.3%		1.6% -3.2%
Dividend yield		—		0%		0%
Expected life (in years)		—		0.1 - 7.7		3.5 - 8.4
Volatility (range)		—		35% - 72%		54% - 59%
Volatility (weighted average)		—		60%		57%

Year ended January 31,	2012		2011		2010
Employee Options Exchange
Risk-free interest rate		—		0.2% -2.7%		—
Dividend yield		—		0%		—
Expected life (in years)		—		0.5 - 5.9		—
Volatility (range)		—		43% - 77%		—
Volatility (weighted average)		—		43%		—

Stock-based Compensation Expense Included in the Results of Operations and the Tax Benefit Associated with the Exercise of Stock Options

The following table summarizes stock-based compensation expense included in the results of operations and the tax benefit associated with the exercise of stock options:

Year ended January 31,	2012		2011		2010
Cost of revenues:
Service and support	$	1,065	$	888	$	1,618
Operating expense:
Research and development		8,203		7,785		10,931
Marketing and selling		5,874		6,112		8,406
General and administration		6,516		5,726		5,204
Equity plan-related compensation expense (1)	$	21,658	$	20,511	$	26,159
Tax effect of the exercise of stock options	$	—	$	—	$	(96	)

(1) All of equity plan-related compensation expense for the years ended January 31, 2012 and 2011 relates to stock options, stock awards, and the ESPPs. Equity plan-related compensation expense for the year ended January 31, 2010 includes $25,657 relating to stock options, stock awards, and the ESPPs and $502 relating to the amortization of expense associated with stock issued to the founders of a company we acquired during the year ended January 31, 2008.

Matching Contributions to Savings Plan

Our matching contributions to the Savings Plan were as follows:

Year ended January 31,	2012		2011		2010
Employer matching contribution	$	7,141	$	6,413	$	4,928