Property, Plant and Equipment (Major Classifications Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Mar. 25, 2017	Mar. 26, 2016
Major classifications of property, plant and equipment
Property, plant and equipment	$ 712,999	$ 639,936
Less - Accumulated depreciation and amortization	318,365	288,354
Net property, plant and equipment	394,634	351,582
Land [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	83,675	80,195
Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	371,352	325,390
Equipment, Signage and Fixtures [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	225,977	208,204
Vehicles [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	28,831	23,608
Construction-in-Progress [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	3,164	2,539
Assets Owned [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	565,213	526,967
Less - Accumulated depreciation and amortization	282,196	258,516
Net property, plant and equipment	283,017	268,451
Assets Owned [Member] | Land [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	83,675	80,195
Assets Owned [Member] | Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	223,566	212,421
Assets Owned [Member] | Equipment, Signage and Fixtures [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	225,977	208,204
Assets Owned [Member] | Vehicles [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	28,831	23,608
Assets Owned [Member] | Construction-in-Progress [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	3,164	2,539
Assets Under Capital Lease [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	147,786	112,969
Less - Accumulated depreciation and amortization	36,169	29,838
Net property, plant and equipment	111,617	83,131
Assets Under Capital Lease [Member] | Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	$ 147,786	$ 112,969