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The number of stores acquired by the entity during the period.

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Amount of cash paid to acquire the entity.

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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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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
	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