Property, Plant and Equipment (Major Classifications Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Mar. 30, 2019
Major classifications of property, plant and equipment
Property, plant and equipment	$ 682,932	$ 640,421
Less - Accumulated depreciation and amortization	354,295	327,869
Property, plant and equipment, net	328,637	312,552
Land [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	84,765	85,623
Buildings and Improvements [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	272,724	251,431
Equipment, Signage and Fixtures [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	278,324	256,411
Vehicles [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	38,356	36,393
Construction-in-Progress [Member]
Major classifications of property, plant and equipment
Property, plant and equipment	$ 8,763	$ 10,563