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Summary Of Significant Accounting Policies (Calculation Of Basic And Diluted Earnings Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 30, 2013
Dec. 29, 2012
Sep. 29, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 24, 2011
Jun. 25, 2011
Mar. 30, 2013
Mar. 31, 2012
Mar. 26, 2011
Summary Of Significant Accounting Policies [Abstract]                      
Net income $ 26,360 $ 67,862 $ 35,449 $ 6,927 $ 50,827 [1] $ 16,731 $ 11,247 $ 9,178 $ 136,598 $ 87,983 $ 203,503
Weighted average shares outstanding                 64,580 64,934 67,857
Effect of dilutive securities                 3,874 3,129 4,246
Weighted average diluted shares                 68,454 68,063 72,103
Basic earnings per share $ 0.41 $ 1.04 $ 0.55 $ 0.11 $ 0.79 [1] $ 0.26 $ 0.17 $ 0.14 $ 2.12 $ 1.35 $ 3.00
Diluted earnings per share $ 0.39 $ 0.99 $ 0.51 $ 0.10 $ 0.75 [1] $ 0.25 $ 0.17 $ 0.13 $ 2.00 $ 1.29 $ 2.82
[1] The $39.5 million tax benefit recorded in the fourth quarter of 2012 favorably impacted net income, as a result of a $37.3 million release in valuation allowance on deferred tax assets.