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Notes Payable to Former Stockholders - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Notes Payable [Line Items] | |||
| Accrued interest expense pertaining to Notes | $ 396,000us-gaap_InterestPayableCurrent | $ 425,000us-gaap_InterestPayableCurrent | |
| Interest expense | 1,651,000us-gaap_InterestExpense | 105,000us-gaap_InterestExpense | 4,000us-gaap_InterestExpense |
| Accrued interest expense related to IPO | 318,000mmi_InterestExpenseRelatedToNotesPayablePriorToIpo | ||
| Payments of principal and interest amount | 1,500,000us-gaap_DebtInstrumentPeriodicPayment | ||
| Payments pertained to interest | 618,000us-gaap_DebtInstrumentPeriodicPaymentInterest | ||
| Payments pertained to principal | 851,000us-gaap_RepaymentsOfNotesPayable | ||
| Restricted Stock - Notes Payable [Member] | |||
| Notes Payable [Line Items] | |||
| Unsecured notes interest rate |
5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_AwardTypeAxis = mmi_RestrictedStockNotesPayableMember |
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| Unsecured notes maturity date | Apr. 14, 2020 | ||
| SARs - Notes Payable [Member] | |||
| Notes Payable [Line Items] | |||
| Unsecured notes interest rate |
5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate / us-gaap_AwardTypeAxis = mmi_StockAppreciationRightsSarsNotesPayableMember |
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| Unsecured notes maturity date | Jun. 30, 2020 | ||
| Notes Payable to Former Stockholders [Member] | |||
| Notes Payable [Line Items] | |||
| Interest expense |
$ 591,000us-gaap_InterestExpense / us-gaap_ShortTermDebtTypeAxis = mmi_NotesPayableToFormerStockholdersMember |
$ 103,000us-gaap_InterestExpense / us-gaap_ShortTermDebtTypeAxis = mmi_NotesPayableToFormerStockholdersMember |
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- Definition
Accrued interest expense prior to the IPO date of October 31, 2013 related to notes payable to former stockholders that was recorded in additional paid-in capital. No definition available.
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- Details
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- Definition
Date when the notes payable to former stockholders is scheduled to be fully repaid. No definition available.
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- Definition
Amount of the required periodic payments including both interest and principal payments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the required periodic payments applied to interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow for a borrowing supported by a written promise to pay an obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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- Details
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