Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 28, 2015	Mar. 29, 2014
Consolidated Balance Sheets [Abstract]
Class C convertible preferred stock par value	$ 1.50	$ 1.50
Class C convertible preferred stock, conversion value	$ 0.064mnro_PreferredStockConversionRate	$ 0.064mnro_PreferredStockConversionRate
Class C convertible preferred stock shares authorized	150,000us-gaap_PreferredStockSharesAuthorized	150,000us-gaap_PreferredStockSharesAuthorized
Class C convertible preferred stock shares issued	32,500us-gaap_PreferredStockSharesIssued	32,500us-gaap_PreferredStockSharesIssued
Class C convertible preferred stock shares outstanding	32,500us-gaap_PreferredStockSharesOutstanding	32,500us-gaap_PreferredStockSharesOutstanding
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	65,000,000us-gaap_CommonStockSharesAuthorized	65,000,000us-gaap_CommonStockSharesAuthorized
Common shares issued	38,007,537us-gaap_CommonStockSharesIssued	37,567,902us-gaap_CommonStockSharesIssued
Treasury stock shares	6,180,489us-gaap_TreasuryStockShares	6,076,951us-gaap_TreasuryStockShares

The rate at which the preferred stock can be converted into common stock.

No definition available.

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- Definition

Face amount or stated value per share of common stock.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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