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Related Party Transactions (Details) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2004 numberofleases | Mar. 30, 2013 | Mar. 31, 2012 | Mar. 26, 2011
Related Party Transactions (Textual) [Abstract] |  |  |  |
Operating and capital leases |  | $ 685,000 | $ 669,000 | $ 653,000
Related party leases | 6 |  |  |
Annual fee |  | $ 300,000 | $ 300,000 | $ 300,000

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- Definition Number of related party leases + References No definition available. + Details
Name: | mnro_NumberOfRelatedPartyLeases
Namespace Prefix: | mnro_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Operating and capital lease payments made to a related party. + References No definition available. + Details
Name: | mnro_OperatingAndCapitalLeases
Namespace Prefix: | mnro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Investment fees arising from transactions with related parties who are not affiliates or joint ventures. + References No definition available. + Details
Name: | mnro_RelatedPartyInvestmentAdvisoryFees
Namespace Prefix: | mnro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | mnro_RelatedPartyTransactionsTextualAbstract
Namespace Prefix: | mnro_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration