Common Stock and Stock Plans (Tables)

12 Months Ended

Mar. 31, 2017

Equity [Abstract]

Summary of Stock-based Compensation Expense

Total stock-based compensation expense recognized in accordance with the authoritative guidance for share-based payments was as follows:

	Fiscal Years Ended
	March 31, 2017			March 31, 2016			April 3, 2015
	(In thousands)
Stock-based compensation expense before taxes	$	55,775		$	47,510		$	39,353
Related income tax benefits		(21,057	)		(18,089	)		(14,889	)
Stock-based compensation expense, net of taxes	$	34,718		$	29,421		$	24,464

Summary of Employee Stock Options and Employee Stock Purchase Plan Weighted Average Assumptions

The weighted average estimated fair value of employee stock options granted and employee stock purchase plan shares issued during fiscal year 2017 was $23.62 and $16.27 per share, respectively, during fiscal year 2016 was $20.35 and $13.37 per share, respectively, and during fiscal year 2015 was $22.22 and $14.18 per share, respectively, using the Black-Scholes model with the following weighted average assumptions (annualized percentages):

	Employee Stock Options									Employee Stock Purchase Plan
	Fiscal Year 2017			Fiscal Year 2016			Fiscal Year 2015			Fiscal Year 2017			Fiscal Year 2016			Fiscal Year 2015
Volatility		33.4	%		32.9	%		34.0	%		31.1	%		24.6	%		30.6	%
Risk-free interest rate		1.7	%		1.7	%		1.7	%		0.5	%		0.3	%		0.1	%
Dividend yield		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%		0.0	%
Expected life		5.5 years			5.5 years			5.5 years			0.5 years			0.5 years			0.5 years

Summary of Employee Stock Option Activity

A summary of employee stock option activity for fiscal year 2017 is presented below:

	Number of Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value (In thousands)
Outstanding at March 31, 2016		1,833,437		$	54.07
Options granted		463,000			70.09
Options canceled		(19,125	)		64.66
Options exercised		(273,050	)		44.37
Outstanding at March 31, 2017		2,004,262		$	58.99		3.53	$	13,283
Vested and exercisable at March 31, 2017		1,011,200		$	52.19		2.31	$	12,147

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity for fiscal year 2017 is presented below:

	Number of Restricted Stock Units			Weighted Average Grant Date Fair Value per Share
Outstanding at March 31, 2016		2,369,339		$	59.39
Awarded		1,195,961			69.99
Forfeited		(93,330	)		66.01
Released		(792,616	)		57.44
Outstanding at March 31, 2017		2,679,354		$	64.47
Vested and deferred at March 31, 2017		148,503		$	38.19