Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 29, 2018	Sep. 23, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 7,510	$ 3,117
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	12 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 5,599	984
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	13 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,511	$ 2,133
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	10 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]
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]
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]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	10 years