Description Of Business, Basis Of Presentation And Summary Of Significant Accounting Policies (Schedule Of Estimated Useful Lives) (Details)	12 Months Ended
	Mar. 27, 2021
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	10 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	39 years
Equipment, Signage And Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Equipment, Signage And Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	15 years
Vehicles [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	5 years
Vehicles [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful lives	10 years