Acquisitions (Schedule Of Intangible Assets Acquired) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 24, 2017	Jun. 25, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 433	$ 6,731
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	9 years
Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 163	2,981
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	7 years
Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 270	3,450
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	10 years
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets		$ 300
Fiscal 2016 Acquisitions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	13 years
Fiscal 2016 Acquisitions [Member] | Customer Lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	12 years
Fiscal 2016 Acquisitions [Member] | Favorable Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	16 years
Fiscal 2016 Acquisitions [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	2 years