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Stock-Based Compensation Plans - Summary of SARs Activity - Pre-IPO (Parenthetical) (Detail) (Deferred stock units [Member], MMREIS Managing Directors [Member], 2013 Omnibus Equity Incentive Plan [Member])
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1 Months Ended | 12 Months Ended |
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Nov. 30, 2013
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Dec. 31, 2014
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Deferred stock units [Member] | MMREIS Managing Directors [Member] | 2013 Omnibus Equity Incentive Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Fully vested deferred stock units |
2,192,413mmi_FullyVestedDeferredStockUnits / us-gaap_AwardTypeAxis = mmi_DeferredStockUnitsMember / us-gaap_PlanNameAxis = mmi_TwoThousandAndThirteenOmnibusEquityAwardPlanMember / us-gaap_TitleOfIndividualAxis = mmi_MarcusAndMillichapRealEstateInvestmentServicesManagingDirectorsMember |
2,192,413mmi_FullyVestedDeferredStockUnits / us-gaap_AwardTypeAxis = mmi_DeferredStockUnitsMember / us-gaap_PlanNameAxis = mmi_TwoThousandAndThirteenOmnibusEquityAwardPlanMember / us-gaap_TitleOfIndividualAxis = mmi_MarcusAndMillichapRealEstateInvestmentServicesManagingDirectorsMember |
| X | ||||||||||
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- Definition
Fully vested deferred stock units that will be settled into actual common stock at a year rate of 20% per year as specified in the terms per the agreement. No definition available.
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- Details
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