Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Mar. 28, 2009	$ 65	$ 945,390	$ (771,951)	$ (576)	$ 172,928
Balance, shares at Mar. 28, 2009	65,241
Components of comprehensive income:
Net income			38,398		38,398
Change in unrealized gain on marketable securities				(73)	(73)
Total comprehensive income					38,325
Issuance of stock under stock option plans and other, value	1	2,029			2,030
Issuance of stock under stock option plans and other, shares	412
Amortization of deferred stock compensation		5,318			5,318
Balance at Mar. 27, 2010	66	952,737	(733,553)	(649)	218,601
Balance, shares at Mar. 27, 2010	65,653
Components of comprehensive income:
Net income			203,503		203,503
Change in unrealized gain on marketable securities				(105)	(105)
Total comprehensive income					203,398
Issuance of stock under stock option plans and other, value	5	31,000			31,005
Issuance of stock under stock option plans and other, shares	4,770
Repurchase and retirement of common stock, value	(2)		(22,764)		(22,766)
Repurchase and retirement of common stock, shares	(1,759)
Amortization of deferred stock compensation		8,141			8,141
Balance at Mar. 26, 2011	69	991,878	(552,814)	(754)	438,379
Balance, shares at Mar. 26, 2011	68,664
Components of comprehensive income:
Net income			87,983		87,983
Change in unrealized gain on marketable securities				(8)	(8)
Total comprehensive income					87,975
Issuance of stock under stock option plans and other, value		4,108			4,108
Issuance of stock under stock option plans and other, shares	642
Repurchase and retirement of common stock, value	(5)		(76,778)		(76,783)
Repurchase and retirement of common stock, shares	(4,912)
Amortization of deferred stock compensation		12,178			12,178
Balance at Mar. 31, 2012	$ 64	$ 1,008,164	$ (541,609)	$ (762)	$ 465,857
Balance, shares at Mar. 31, 2012	64,394