Employee Stock and Savings Plans (Tables)

12 Months Ended

Jan. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award

Schedule of restricted stock units award activity

The following table summarizes restricted stock unit activity (including the target number of shares awarded for 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, 2015	4,246		$	19.63
Granted	1,711		$	24.10
Vested	(1,586	)	$	17.35
Forfeited	(254	)	$	19.95
Nonvested as of January 31, 2016	4,117		$	22.35	1.62	$	71,561

Schedule of fair value of stock awards vested

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

Year ended January 31,	2016		2015		2014
Total fair value of restricted stock units vested	$	27,527	$	22,874	$	17,736

Schedule of 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, 2015	3,152		$	9.73
Granted	—		$	—
Exercised	(639	)	$	9.79
Forfeited	(26	)	$	16.20
Expired	(16	)	$	8.26
Balance as of January 31, 2016	2,471		$	9.66	3.98	$	19,085
Options exercisable as of January 31, 2016	2,395		$	9.42	3.90	$	19,058
Options vested as of January 31, 2016 and options expected to vest after January 31, 2016	2,471		$	9.66	3.98	$	19,085

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,	2016		2015		2014
Intrinsic value	$	9,440	$	4,601	$	26,769
Cash received	$	6,260	$	4,636	$	38,830

Schedule of shares issued under employee stock purchase plan and other associated information

The following table summarizes shares issued under the ESPPs and other associated information:

Year ended January 31,	2016		2015		2014
Shares issued under the ESPPs	1,538		1,389		1,554
Cash received for the purchase of shares under the ESPPs	$	26,511	$	25,642	$	23,895
Weighted average purchase price per share	$	17.24	$	18.47	$	15.38

Summary of the weighted average grant date fair value

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

Year ended January 31,	2016		2015		2014
Restricted stock units granted	$	24.10	$	21.52	$	22.42
ESPP purchase rights	$	5.08	$	4.81	$	4.30

Schedule of employee stock purchase plan valuation assumptions

The fair value calculations for ESPPs used the following assumptions:

Year ended January 31,	2016		2015		2014
Risk-free interest rate	0.08% - 0.31%		0.05% - 0.09%		0.09% - 0.14%
Dividend yield (range)	0.8% - 1.2%		0.8% - 0.9%		0.0% - 1.0%
Dividend yield (weighted average)	0.9	%	0.8	%	0.5	%
Expected life (in years)	0.5		0.5		0.5
Volatility (range)	23% - 36%		22% - 23%		22% - 33%
Volatility (weighted average)	25	%	22	%	29	%

Schedule of employee service share-based compensation, allocation of recognized period costs

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,	2016		2015		2014
Cost of revenues:
Service and support	$	2,607	$	2,304	$	1,992
Operating expense:
Research and development	16,207		14,027		11,182
Marketing and selling	9,623		9,103		7,777
General and administration	12,060		10,373		8,399
Equity plan-related compensation expense	$	40,497	$	35,807	$	29,350
Tax effect of the exercise of stock options	$	217	$	280	$	386

Matching contribution to savings plan

Our matching contributions to the Savings Plan were as follows:

Year ended January 31,	2016		2015		2014
Employer matching contribution	$	8,930	$	8,190	$	7,708