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Acquisitions (Details Textual) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended
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Mar. 30, 2013 | Mar. 31, 2012 | Dec. 30, 2012 Enger Auto Service Mentor Inc. [Member] numberofstores | Dec. 30, 2012 Tire King of Durham, Inc [Member] numberofstores | Dec. 16, 2012 Ken Towery's Auto Care [Member] numberofstores | Nov. 18, 2012 Everybody's Oil Corporation [Member] numberofstores | Oct. 13, 2012 Brothers Tire, Inc [Member] numberofstores | Oct. 07, 2012 Chesley Co. Inc [Member] numberofstores | Aug. 12, 2012 Tuffy Associates Corp [Member] numberofstores | Jun. 03, 2012 Colony [Member] numberofstores | Apr. 28, 2012 Kramer [Member] numberofstores | Jun. 25, 2011 Vespia [Member] numberofstores | Dec. 24, 2011 Ohio, Pennsylvania, and Maine [Member] numberofstores
Acquisitions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Preliminary aggregate purchase price | $ 163.6 | $ 39.2 |  |  |  |  |  |  |  |  |  |  |
Number of stores acquired |  |  | 12 | 9 | 27 | 31 | 1 | 5 | 17 | 18 | 20 | 24 | 8
Annual sales based on unaudited pre-acquisition historical information |  |  | 9 | 11 | 54 | 64 | 1 | 3 | 9 | 25 | 25 | 36 | 11
Sales of acquired entities for the reporting period from acquisition date | 87 | 31 |  |  |  |  |  |  |  |  |  |  |
Net (loss) income of acquired entities for the reporting period from acquisition date | (1.4) | 1.0 |  |  |  |  |  |  |  |  |  |  |
Acquisition Costs, Period Cost | $ 2.1 |  |  |  |  |  |  |  |  |  |  |  |

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