Income Taxes (Summary Of Provision (Benefit) For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 26, 2011	Mar. 31, 2012	Mar. 26, 2011	Mar. 27, 2010
Income Taxes [Line Items]
Total current tax provision			$ 2,101	$ 679	$ 197
Total deferred tax provision (benefit)			(10,101)	(119,968)	(11,912)
Provision for income taxes	(39,500)	(117,000)	(8,000)	(119,289)	(11,715)
Federal [Member]
Income Taxes [Line Items]
Total current tax provision			1,322	163	(75)
U.S [Member]
Income Taxes [Line Items]
Total deferred tax provision (benefit)			(10,102)	(120,057)	(11,787)
State [Member]
Income Taxes [Line Items]
Total current tax provision			518	312	8
Non-U.S [Member]
Income Taxes [Line Items]
Total current tax provision			261	204	264
Total deferred tax provision (benefit)			$ 1	$ 89	$ (125)