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Income Taxes (Income taxes associated with unrecognized tax benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Income taxes associated with unrecognized tax benefits
Unrecognized Tax Benefits, Beginning Balance	$ 5,900us-gaap_UnrecognizedTaxBenefits	$ 5,704us-gaap_UnrecognizedTaxBenefits	$ 5,484us-gaap_UnrecognizedTaxBenefits
Tax positions related to current year:
Additions	2,066us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1,678us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1,198us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Tax positions related to prior years:
Additions	164us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Reductions	33us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	(88)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Settlements		(381)mnro_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromSettlementsWithTaxingAuthorities	(266)mnro_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromSettlementsWithTaxingAuthorities
Lapses in statutes of limitations	(668)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	(1,013)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	(712)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Unrecognized Tax Benefits, Ending Balance	$ 7,495us-gaap_UnrecognizedTaxBenefits	$ 5,900us-gaap_UnrecognizedTaxBenefits	$ 5,704us-gaap_UnrecognizedTaxBenefits

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The gross amount of increases or decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854



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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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