Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Mar. 31, 2012	$ 64	$ 1,008,164	$ (541,609)	$ (762)	$ 465,857
Balance, shares at Mar. 31, 2012	64,394
Net income			136,598		136,598
Change in unrealized gain (loss) on marketable securities, net of tax				(157)	(157)
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	2	12,006	(1,674)		10,334
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	1,907
Repurchase and retirement of common stock, value	(3)		(86,056)		(86,059)
Repurchase and retirement of common stock, shares	(3,010)
Amortization of deferred stock compensation		21,495			21,495
Excess tax benefit from employee stock options		106			106
Balance at Mar. 30, 2013	63	1,041,771	(492,741)	(919)	548,174
Balance, shares at Mar. 30, 2013	63,291
Net income			108,111		108,111
Change in unrealized gain (loss) on marketable securities, net of tax				33	33
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	1	5,319	(3,868)		1,452
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	1,301
Repurchase and retirement of common stock, value	(2)		(52,136)		(52,138)
Repurchase and retirement of common stock, shares	(2,636)
Amortization of deferred stock compensation		23,281			23,281
Excess tax benefit from employee stock options		8,445			8,445
Balance at Mar. 29, 2014	62	1,078,816	(440,634)	(886)	637,358
Balance, shares at Mar. 29, 2014	61,956
Net income			55,178		55,178
Change in unrealized gain (loss) on marketable securities, net of tax				69	69
Change in pension liability, net of tax				(1,293)	(1,293)
Change in foreign currency translation adjustments		(29)			(29)
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	2	5,326	(4,624)		704
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	1,709
Repurchase and retirement of common stock, value	(1)		(10,533)		(10,534)
Repurchase and retirement of common stock, shares	(580)
Amortization of deferred stock compensation		37,626			37,626
Excess tax benefit from employee stock options		37,692			37,692
Balance at Mar. 28, 2015	$ 63	$ 1,159,431	$ (400,613)	$ (2,110)	$ 756,771
Balance, shares at Mar. 28, 2015	63,085