Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 2,917	$ 17,804
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	9 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,003	9,461
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	7 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,914	5,388
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	10 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 2,955
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	17 years
Fiscal 2017 Acquisitions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	14 years
Fiscal 2017 Acquisitions [Member] | Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	13 years
Fiscal 2017 Acquisitions [Member] | Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	14 years
Fiscal 2017 Acquisitions [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	17 years