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Share Based Compensation (Details 1) (USD $)
12 Months Ended
Mar. 31, 2012
Mar. 26, 2011
Mar. 27, 2010
A summary of the status of and changes in nonvested stock options granted      
Nonvested, shares, beginning balance 930,039 670,498 841,638
Granted, shares 173,075 788,027 255,420
Vested, shares (357,697) (497,655) (406,872)
Canceled, shares (23,342) (30,831) (19,688)
Nonvested, shares, ending balance 722,075 930,039 670,498
Weighted average grant date fair value, beginning of period $ 7.83 $ 4.49 $ 4.21
Weighted average grant date fair value, granted $ 8.41 $ 8.58 $ 5.38
Weighted average grant date fair value, vested $ 7.54 $ 4.73 $ 4.37
Weighted average grant date fair value, canceled $ 6.62 $ 5.57 $ 4.78
Weighted average grant date fair value, end of period $ 8.16 $ 7.83 $ 4.49