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Employee Retirement and Profit Sharing Plans (Components of pension (income) expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 25, 2017
Mar. 26, 2016
Employee Retirement and Profit Sharing Plans [Abstract]      
Interest cost on projected benefit obligation $ 796 $ 806 $ 803
Expected return on plan assets (1,416) (1,332) (1,389)
Amortization of unrecognized actuarial loss 336 524 648
Net pension (income) expense $ (284) $ (2) $ 62