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Earnings Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended6 Months Ended
Sep. 30, 2011
Oct. 01, 2010
Sep. 30, 2011
Oct. 01, 2010
Earnings Per Share [Abstract]    
Denominator-weighted average shares outstanding used in computing basic earnings per common share52,30954,98553,23755,539
Assumed conversion of the 2008 Notes1,17701,898405
Assumed vesting of restricted stock400723457758
Assumed exercise of stock options70[1]179[1]80[1]203[1]
Denominator-weighted average shares outstanding used in computing diluted earnings per common share53,95655,88755,67256,905
Convertible Debt [Abstract]    
Conversion price of convertible debt$ 21.22 $ 21.22 
Exercise price of warrants28.29 28.29 
[1]There were no anti-dilutive options outstanding as of September 30, 2011 and October 1, 2010.