Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 23, 2017	Dec. 24, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 3,380	$ 18,089
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	9 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,076	9,540
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	7 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 2,304	5,594
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