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Share Based Compensation (A summary of the status of and changes in nonvested stock options granted) (Details) (USD $)	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
A summary of the status of and changes in nonvested stock options granted
Non-vested, shares, beginning balance	612,829mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance	879,197mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance	722,075mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance
Granted, shares	211,225mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsGrantsInPeriod	181,400mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsGrantsInPeriod	511,600mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsGrantsInPeriod
Vested, shares	(382,197)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsVestedInPeriod	(417,743)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsVestedInPeriod	(332,566)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsVestedInPeriod
Canceled, shares	(22,128)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsCanceledInPeriod	(30,025)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsCanceledInPeriod	(21,912)mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsCanceledInPeriod
Non-vested, shares, ending balance	419,729mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance	612,829mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance	879,197mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsBalance
Weighted average grant date fair value, beginning of period	$ 8.88mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue	$ 8.52mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue	$ 8.16mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue
Weighted average grant date fair value, granted	$ 11.27mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageGrantsInPeriodFairValue	$ 10.11mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageGrantsInPeriodFairValue	$ 8.67mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageGrantsInPeriodFairValue
Weighted average grant date fair value, vested	$ 9.22mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageVestedInPeriodFairValue	$ 8.66mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageVestedInPeriodFairValue	$ 7.98mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageVestedInPeriodFairValue
Weighted average grant date fair value, canceled	$ 10.37mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageCanceledInPeriodFairValue	$ 8.90mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageCanceledInPeriodFairValue	$ 8.26mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageCanceledInPeriodFairValue
Weighted average grant date fair value, end of period	$ 9.70mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue	$ 8.88mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue	$ 8.52mnro_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonvestedOptionsWeightedAverageBalanceFairValue

X

- Definition

The number of shares of non-vested stock options granted that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

The number of shares of non-vested stock options canceled during the period.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

The number of shares of non-vested stock options granted during the period.

+ References

No definition available.

+ Details

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X

- Definition

The number of shares of non-vested stock options vested during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of non-vested stock options granted that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of non-vested stock options canceled during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of non-vested stock options granted during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of non-vested stock options vested during the period.

+ References

No definition available.

+ Details

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