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Significant Accounting Policies (Narrative) (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) state segment property store item | Mar. 26, 2016 shares | Mar. 25, 2017 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Company operated stores | store | 1,150 |  |
Franchised locations | store | 102 |  |
Number of wholesale locations | property | 5 |  |
Number of retread facilities | property | 2 |  |
Dealer-operated automotive repair centers | store | 2 |  |
Number of States in which Entity Operates | state | 27 |  |
Number of operating segments | segment | 1 |  |
Number of reporting units | item | 1 |  |
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 | $ | $ 4.4 |  |
Liability for anticipated lease defaults | $ | $ 0.2 |  | $ 0.6
Stock Options [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 |  | 32,000 |
Number of stock options exercised in settlement of surrendered shares |  | 89,000 |
Board of Directors Chairman [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of shares surrendered in settlement of stock options exercised |  | 100,000 |
Number of stock options exercised in settlement of surrendered 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 | 5 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 Represents the number of dealer operated automotive repair centers. + References No definition available. + Details
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- Definition Number of retread facilities + References No definition available. + Details
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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 stock options exercised by the employee in settlement of the surrender of shares. + References No definition available. + Details
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- Definition Number of wholesale locations + References No definition available. + Details
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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 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 Represents the number of stores. + References No definition available. + Details
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