Property, Plant and Equipment (Major Classifications Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Mar. 31, 2018
Major classifications of property, plant and equipment
Property, plant and equipment	$ 826,778	$ 767,864
Less - Accumulated depreciation and amortization	386,197	351,195
Net property, plant and equipment	440,581	416,669
Land [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	85,623	85,843
Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	437,788	403,397
Equipment, Signage and Fixtures [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	256,411	242,510
Vehicles [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	36,393	32,380
Construction-in-Progress [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	10,563	3,734
Assets Owned [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	632,641	596,576
Less - Accumulated depreciation and amortization	326,602	304,762
Net property, plant and equipment	306,039	291,814
Assets Owned [Member] | Land [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	85,623	85,843
Assets Owned [Member] | Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	243,651	232,109
Assets Owned [Member] | Equipment, Signage and Fixtures [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	256,411	242,510
Assets Owned [Member] | Vehicles [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	36,393	32,380
Assets Owned [Member] | Construction-in-Progress [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	10,563	3,734
Assets Under Capital Lease/Finance Obligations [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	194,137	171,288
Less - Accumulated depreciation and amortization	59,595	46,433
Net property, plant and equipment	134,542	124,855
Assets Under Capital Lease/Finance Obligations [Member] | Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	$ 194,137	$ 171,288