Employee Stock and Savings Plans (Tables)

12 Months Ended

Jan. 31, 2017

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, 2016	4,117		$	22.35
Granted	2,008		$	23.82
Vested	(1,639	)	$	21.52
Forfeited	(143	)	$	22.15
Nonvested as of January 31, 2017	4,343		$	23.34	1.63	$	160,304

Schedule of fair value of stock awards vested

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

Fiscal year ended January 31,	2017		2016		2015
Total fair value of restricted stock units vested	$	35,264	$	27,527	$	22,874

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, 2016	2,471		$	9.66
Granted	—		$	—
Exercised	(294	)	$	10.10
Forfeited	—		$	—
Expired	(16	)	$	12.69
Balance as of January 31, 2017	2,161		$	9.57	3.21	$	59,069
Options exercisable as of January 31, 2017	2,161		$	9.57	3.21	$	59,069

Proceeds from and intrinsic value of options exercised

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

Fiscal year ended January 31,	2017		2016		2015
Intrinsic value	$	4,408	$	9,440	$	4,601
Cash received	$	2,964	$	6,260	$	4,636

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:

Fiscal year ended January 31,	2017		2016		2015
Shares issued under the ESPPs	1,772		1,538		1,389
Cash received for the purchase of shares under the ESPPs	$	29,546	$	26,511	$	25,642
Weighted average purchase price per share	$	16.67	$	17.24	$	18.47

Summary of the weighted average grant date fair value

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

Fiscal year ended January 31,	2017		2016		2015
Restricted stock units granted	$	23.82	$	24.10	$	21.52
ESPP purchase rights	$	5.22	$	5.08	$	4.81

Schedule of employee stock purchase plan valuation assumptions

The fair value calculations for ESPPs used the following assumptions:

Fiscal year ended January 31,	2017		2016		2015
Risk-free interest rate	0.31% - 0.40%		0.08% - 0.31%		0.05% - 0.09%
Dividend yield (range)	1.0% - 1.2%		0.8% - 1.2%		0.8% - 0.9%
Dividend yield (weighted average)	1.1	%	0.9	%	0.8	%
Expected life (in years)	0.5		0.5		0.5
Volatility (range)	36% - 48%		23% - 36%		22% - 23%
Volatility (weighted average)	41	%	25	%	22	%

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:

Fiscal year ended January 31,	2017		2016		2015
Cost of revenues:
Service and support	$	3,085	$	2,607	$	2,304
Operating expense:
Research and development	18,205		16,207		14,027
Marketing and selling	12,274		9,623		9,103
General and administration	13,229		12,060		10,373
Equity plan-related compensation expense	$	46,793	$	40,497	$	35,807
Tax effect of the exercise of stock options	$	114	$	217	$	280

Matching contribution to savings plan

Our matching contributions to the Savings Plan were as follows:

Fiscal year ended January 31,	2017		2016		2015
Employer matching contribution	$	9,212	$	8,930	$	8,190