Stock-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2013

Summary of Stock Option Activity

A summary of stock option activity is as follows:

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
	(In thousands)							(In thousands)
Outstanding at March 28, 2010		24,256		$	19.50
Granted		2,829			17.74
Exercised		(2,091	)		14.18
Forfeited (cancelled pre-vesting)		(708	)		15.42
Expired (cancelled post-vesting)		(2,430	)		32.13
Outstanding at April 3, 2011		21,856			18.51
Granted		1,630			15.73
Exercised		(1,544	)		14.83
Forfeited (cancelled pre-vesting)		(686	)		15.86
Expired (cancelled post-vesting)		(2,245	)		24.93
Outstanding at April 1, 2012		19,011			17.91
Granted		1,387			13.67
Exercised		(79	)		14.31
Forfeited (cancelled pre-vesting)		(177	)		15.82
Expired (cancelled post-vesting)		(3,313	)		20.23
Outstanding at March 31, 2013		16,829		$	17.14		4.8	$	52
Vested and expected to vest at March 31, 2013		16,478		$	17.19		4.7	$	44
Exercisable at March 31, 2013		13,841		$	17.56		4.1	$	10

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity is as follows:

	Number of Shares			Weighted- Average Grant Date Fair Value
	(In thousands)
Outstanding and unvested at March 28, 2010		2,514		$	14.78
Granted		965			17.79
Vested		(959	)		15.31
Forfeited		(249	)		15.11
Outstanding and unvested at April 3, 2011		2,271			15.80
Granted		1,656			15.63
Vested		(879	)		15.58
Forfeited		(362	)		15.82
Outstanding and unvested at April 1, 2012		2,686			15.77
Granted		1,753			13.52
Vested		(1,002	)		15.43
Forfeited		(186	)		14.94
Outstanding and unvested at March 31, 2013		3,251		$	14.71

Summary of Stock-Based Compensation Expense

A summary of stock-based compensation expense, by functional line item in the consolidated statements of income, is as follows:

	2013		2012		2011
	(In thousands)
Cost of revenues	$	2,372	$	2,506	$	2,247
Engineering and development		13,584		14,199		14,222
Sales and marketing		6,853		6,667		6,768
General and administrative		7,554		8,316		8,398
Total continuing operations		30,363		31,688		31,635
Discontinued operations		—		904		3,372
	$	30,363	$	32,592	$	35,007

Weighted-Average Fair Values and Underlying Assumptions

The fair value of stock options granted and shares to be purchased under the ESPP have been estimated at the date of grant using a Black-Scholes option-pricing model. The weighted-average fair values and underlying assumptions are as follows:

	2013						2012						2011
	Stock Options			Employee Stock Purchase Plan			Stock Options			Employee Stock Purchase Plan			Stock Options			Employee Stock Purchase Plan
Fair value	$	4.97		$	2.66		$	5.73		$	3.49		$	6.62		$	3.95
Expected volatility		38	%		36	%		36	%		36	%		38	%		36	%
Risk-free interest rate		0.9	%		0.1	%		1.8	%		0.1	%		2.1	%		0.2	%
Expected life (years)		5.5			0.25			5.5			0.25			5.3			0.25
Dividend yield		—			—			—			—			—			—