Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 9,928
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	12 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 6,042
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	13 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,486
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	12 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 400
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	2 years
Fiscal 2018 Acquisitions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 4,162
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	9 years
Fiscal 2018 Acquisitions [Member] | Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		1,261
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	7 years
Fiscal 2018 Acquisitions [Member] | Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 2,901
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	10 years