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

Investment fees arising from transactions with related parties who are not affiliates or joint ventures.

No definition available.

Name:	mnro_RelatedPartyInvestmentAdvisoryFees
Namespace Prefix:	mnro_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration