Stock-Based Compensation Plans - Summary of SARs Activity - Pre-IPO (Detail)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2014
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Outstanding, beginning balance, Shares | 1,207,009us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber | ||
Outstanding, ending balance, Shares | 913,915us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber | 1,207,009us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber | |
SARs [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Outstanding, beginning balance, Shares |
28,733us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
27,983us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
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Granted |
750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
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Settled |
(28,733)mmi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSettledInPeriod / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
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Outstanding, ending balance, Shares |
28,733us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
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Outstanding, ending balance, Shares |
22,666mmi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVested / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
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- Definition
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Settled In Period No definition available.
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X | ||||||||||
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested No definition available.
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X | ||||||||||
- Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Details
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X | ||||||||||
- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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X | ||||||||||
- Details
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