Revenue (Schedule Of Disaggregated Revenue By Product Group) (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 27, 2021	Mar. 28, 2020	Mar. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues		$ 1,125,721	$ 1,256,524	$ 1,200,230
Brakes [Member]
Disaggregation of Revenue [Line Items]
Revenues		130,179	169,138	162,709
Exhaust [Member]
Disaggregation of Revenue [Line Items]
Revenues		20,201	25,058	28,713
Steering [Member]
Disaggregation of Revenue [Line Items]
Revenues		85,290	100,230	95,711
Tires [Member]
Disaggregation of Revenue [Line Items]
Revenues	[1]	617,815	634,513	601,295
Maintenance [Member]
Disaggregation of Revenue [Line Items]
Revenues		269,337	324,494	308,668
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues		$ 2,899	$ 3,091	$ 3,134

[1] Includes the sale of tire road hazard warranty agreements and tire delivery commissions.