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Revenues (Schedule Of Disaggregated Revenue By Product Group) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 23, 2017	Dec. 29, 2018	Dec. 23, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 310,110	$ 285,730	$ 913,027	$ 842,237
Brakes [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,028	33,313	124,677	109,917
Exhaust [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,802	6,264	22,751	20,137
Steering [Member]
Disaggregation of Revenue [Line Items]
Revenue	23,188	22,778	71,894	69,642
Tires [Member]
Disaggregation of Revenue [Line Items]
Revenue	167,715	152,544	459,236	420,173
Maintenance [Member]
Disaggregation of Revenue [Line Items]
Revenue	73,582	70,043	232,062	219,834
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 795	$ 788	$ 2,407	$ 2,534

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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.

+ References

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

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