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Long-Term Debt, Capital Leases And Financing Obligations (Aggregate debt maturities over the next five years) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 28, 2015
Long-term Debt, by Maturity [Abstract]  
2016 $ 8,908us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2017 8,977us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2018 132,365us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
2019 10,504us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
2020 11,263us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Aggregate Amount [Member] | Capital Lease Obligations [Member]  
Long-term Debt, by Maturity [Abstract]  
2016 19,075us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ mnro_DebtInstrumentByComponentAxis
= mnro_AggregateAmountMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2017 18,601us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ mnro_DebtInstrumentByComponentAxis
= mnro_AggregateAmountMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2018 18,809us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ mnro_DebtInstrumentByComponentAxis
= mnro_AggregateAmountMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2019 18,779us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ mnro_DebtInstrumentByComponentAxis
= mnro_AggregateAmountMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2020 18,810us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ mnro_DebtInstrumentByComponentAxis
= mnro_AggregateAmountMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
Imputed Interest [Member] | Capital Lease Obligations [Member]  
Long-term Debt, by Maturity [Abstract]  
2016 (10,167)us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ mnro_DebtInstrumentByComponentAxis
= mnro_ImputedInterestMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2017 (9,624)us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ mnro_DebtInstrumentByComponentAxis
= mnro_ImputedInterestMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2018 (8,987)us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ mnro_DebtInstrumentByComponentAxis
= mnro_ImputedInterestMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2019 (8,275)us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ mnro_DebtInstrumentByComponentAxis
= mnro_ImputedInterestMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
2020 (7,547)us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ mnro_DebtInstrumentByComponentAxis
= mnro_ImputedInterestMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CapitalLeaseObligationsMember
All Other Debt [Member]  
Long-term Debt, by Maturity [Abstract]  
2018 $ 122,543us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ mnro_DebtInstrumentByComponentAxis
= mnro_AllOtherDebtMember