Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 8,677	$ 436
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	14 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 7,047	166
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	15 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 1,230	$ 270
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