Employee Retirement and Profit Sharing Plans (Components of pension income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Employee Retirement and Profit Sharing Plans [Abstract]
Interest cost on projected benefit obligation	$ 752	$ 781	$ 796
Expected return on plan assets	(1,423)	(1,409)	(1,416)
Amortization of unrecognized actuarial loss	455	403	336
Net pension income	$ (216)	$ (225)	$ (284)