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Employee Retirement and Profit Sharing Plans (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Mar. 26, 2011
Mar. 27, 2010
Components of pension (income) expense      
Interest cost on projected benefit obligation $ 809 $ 814 $ 769
Expected return on plan assets (1,189) (1,094) (824)
Amortization of unrecognized actuarial loss 71 201 384
Net pension (income) expense $ (309) $ (79) $ 329