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Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Millions | 12 Months Ended
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Mar. 25, 2017 USD ($) state segment property store item $ / shares | Mar. 26, 2016 USD ($) $ / shares shares | Mar. 28, 2015 USD ($) $ / shares shares
Significant Accounting Policies [Line Items] |  |  |
Company operated stores | store | 1,118 |  |
Franchised locations | store | 114 |  |
Number of wholesale locations | property | 5 |  |
Number of retread facilities | property | 2 |  |
Dealer-operated automotive repair centers | store | 14 |  |
Number of States in which Entity Operates | state | 27 |  |
Number of operating segments | segment | 1 |  |
Number of reporting units | item | 1 |  |
Weighted average fair value of options granted | $ / shares | $ 12.17 | $ 13.10 | $ 11.27
Stock based compensation expense | $ | $ 2.5 | $ 2.8 | $ 3.3
Income tax benefit related to stock based compensation | $ | $ 1.0 | $ 1.0 | $ 1.2
Advertising expenses amortization period | 2 months |  |
Store leases not recorded on balance sheet, percent | 50.00% |  |
Property Lease Guarantee [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Maximum potential guarantee payments | $ | $ 7.5 |  |
Liability for anticipated lease defaults | $ | $ 0.6 |  |
Employee Stock Option [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Options award vesting period | 4 years |  |
Chief Executive Officer [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of shares surrendered in settlement of stock options exercised | shares |  | 32,000 | 77,000
Number of stock options exercised in settlement of surrendered shares | shares |  | 89,000 | 113,000
Board of Directors Chairman [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of shares surrendered in settlement of stock options exercised | shares |  | 100,000 |
Number of stock options exercised in settlement of surrendered shares | shares |  | 150,000 |
Buildings and Improvements [Member] | Maximum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 39 years |  |
Buildings and Improvements [Member] | Minimum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 10 years |  |
Machinery, Fixtures And Equipment [Member] | Maximum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 15 years |  |
Machinery, Fixtures And Equipment [Member] | Minimum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 3 years |  |
Vehicles [Member] | Maximum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 10 years |  |
Vehicles [Member] | Minimum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 4 years |  |
Computer Hardware And Software [Member] | Maximum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 7 years |  |
Computer Hardware And Software [Member] | Minimum [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Useful lives | 3 years |  |

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- Definition For net share settlement of share-based awards when the employee surrenders shares of stock, this element represents the number of shares surrendered by the employee in settlement of the exercise price and tax withholding obligations on the exercise of stock options. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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