Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Revenue (Schedule Of Disaggregated Revenue By Product Group) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 25, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 1,200,230	$ 1,127,815	$ 1,021,511
Brakes [Member]
Disaggregation of Revenue [Line Items]
Revenue	162,709	146,082
Exhaust [Member]
Disaggregation of Revenue [Line Items]
Revenue	28,713	26,969
Steering [Member]
Disaggregation of Revenue [Line Items]
Revenue	95,711	94,391
Tires [Member]
Disaggregation of Revenue [Line Items]
Revenue	601,295	560,398
Maintenance [Member]
Disaggregation of Revenue [Line Items]
Revenue	308,668	296,658
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 3,134	$ 3,317