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. 30, 2013	Mar. 31, 2012	Mar. 26, 2011
Income Taxes [Line Items]
Total current tax provision		$ 4,103	$ 2,101	$ 679
Total deferred tax provision (benefit)		60,489	(10,101)	(119,968)
Provision for income taxes	39,500	64,592	(8,000)	(119,289)
Federal [Member]
Income Taxes [Line Items]
Total current tax provision		3,537	1,322	163
U.S [Member]
Income Taxes [Line Items]
Total deferred tax provision (benefit)		60,506	(10,102)	(120,057)
State [Member]
Income Taxes [Line Items]
Total current tax provision		323	518	312
Non-U.S [Member]
Income Taxes [Line Items]
Total current tax provision		243	261	204
Total deferred tax provision (benefit)		$ (17)	$ 1	$ 89