Employee Stock and Savings Plans (Tables)

12 Months Ended

Jan. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award

Proceeds From and Intrinsic Value of Options Exercised

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

Year ended January 31,	2014		2013		2012
Intrinsic value	$	26,769	$	21,647	$	15,802
Cash received	$	38,830	$	24,262	$	15,194

Schedule of Restricted Stock Activity

The following table summarizes restricted stock activity (including the target number of shares awarded under performance-based restricted stock units):

	Restricted Stock Units		Weighted Average Grant Date Fair Value		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Nonvested as of January 31, 2013	3,996		$	13.39
Granted	1,616		22.42
Vested	(1,374	)	12.93
Forfeited	(155	)	14.83
Nonvested as of January 31, 2014	4,083		$	17.07	1.60	$	84,925

Schedule Of Fair Value Of Restricted Stock Units Vested

The following table summarizes the fair value of restricted stock units vested:

Year ended January 31,	2014		2013		2012
Total fair value of restricted stock units vested	$	17,736	$	11,698	$	5,446

Schedule of Shares Issued Under Employee Stock Purchase Plans

The following table summarizes shares issued under the ESPPs:

Year ended January 31,	2014		2013		2012
Shares issued under the ESPPs	1,554		1,884		2,099
Cash received for the purchase of shares under the ESPPs	$	23,895	$	22,645	$	22,155
Weighted average purchase price per share	$	15.38	$	12.02	$	10.55

Summary Of The Weighted Average Grant Date Fair Value

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

Year ended January 31,	2014		2013		2012
Options granted	$	—	$	7.18	$	5.43
Restricted stock units granted	$	22.42	$	16.74	$	10.91
ESPP purchase rights	$	4.30	$	3.82	$	3.19

Schedule of Valuation Assumptions

The fair value calculations used the following assumptions:

Year ended January 31,	2014	2013		2012
Stock Option Plans
Risk-free interest rate	—	0.9% - 1.3%		1.2	%
Dividend yield	—	0	%	0	%
Expected life (in years)	—	5.8 - 6.3		6.3
Volatility (range)	—	43% - 53%		53	%
Volatility (weighted average)	—	43	%	53	%

Schedule of Employee Stock Purchase Plan Valuation Assumptions

Year ended January 31,	2014		2013		2012
Employee Stock Purchase Plans
Risk-free interest rate	0.09% - 0.14%		0.05% - 0.15%		0.05% - 0.18%
Dividend yield (range)	0% - 1%		0	%	0	%
Dividend yield (weighted average)	0.5	%	0	%	0	%
Expected life (in years)	0.5		0.5		0.5
Volatility (range)	22% - 33%		33% - 43%		32% - 38%
Volatility (weighted average)	29	%	39	%	35	%

Stock-Compensation Expense Recognized

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,	2014		2013		2012
Cost of revenues:
Service and support	$	1,992	$	1,529	$	1,065
Operating expense:
Research and development	11,182		9,206		8,203
Marketing and selling	7,777		6,654		5,874
General and administration	8,399		6,308		6,516
Equity plan-related compensation expense	$	29,350	$	23,697	$	21,658
Tax effect of the exercise of stock options	$	386	$	266	$	—

Matching Contribution to Savings Plan

Our matching contributions to the Savings Plan were as follows:

Year ended January 31,	2014		2013		2012
Employer matching contribution	$	7,708	$	7,181	$	7,141

Stock Options

Share-based Compensation Arrangement by Share-based Payment Award

Employee Stock and Savings Plans, Stock Options Activity

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

	Options Outstanding		Weighted Average Exercise Price		Weighted Average Remaining Contractual Terms (Years)	Aggregate Intrinsic Value
Balance as of January 31, 2013	6,717		$	11.08
Granted	—		—
Exercised	(3,124	)	12.43
Forfeited	3		4.20
Expired	(9	)	12.37
Balance as of January 31, 2014	3,587		9.87		5.38	$	39,195
Options exercisable as of January 31, 2014	2,933		8.94		4.79	34,784
Options vested as of January 31, 2014 and options expected to vest after January 31, 2014	3,587		$	9.87	5.38	$	39,195