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Significant Accounting Policies Textual (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
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Mar. 30, 2013 numberofautomotiverepaircenters numberofstores numberoffranchiselocations | Mar. 31, 2012 numberofstores numberofautomotiverepaircenters numberoffranchiselocations | Mar. 26, 2011
Significant Accounting Policies (Textual) [Abstract] |  |  |
Company operated stores | 937 |  |
Franchised locations | 3 |  |
Dealer-operated automotive repair centers | 14 |  |
Company reported results minimum | 52 weeks |  |
Company reported results maximum | 53 weeks |  |
Company reported results actual | 52 weeks | 53 weeks | 52 weeks
Maturity period of cash equivalents | three months or less |  |
Impairments as a result of impairment tests | $ 0 |  |
Number of shares surrendered in settlement of stock options exercised | 112,000 | 386,000 | 50,000
Number of stock options exercised in settlement of surrendered shares | 113,000 | 563,000 | 90,000
Vesting period for option awards | 4 years |  |
Weighted average fair value of options granted | $ 8.67 | $ 8.41 | $ 8.58
Stock based compensation expense | 3.1 | 2.7 | 2.3
Income tax benefit related to stock based compensation | $ 1.2 | $ 1.0 | $ 0.9
Stock split conversion ratio |  |  | three-for-two
Stock dividend as a result of a stock split |  |  | 50.00%
Advertising expenses amortization period, minimum | 42 days |  |
Advertising expenses amortization period, maximum | 1 year |  |
Buildings and Improvements [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 39 years |  |
Buildings and Improvements [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 10 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 15 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 5 years |  |
Vehicles [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 10 years |  |
Vehicles [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 5 years |  |
Software [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 7 years |  |
Software [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life, Maximum, years | 3 years |  |

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