Property and Equipment - Additional Information (Detail) (USD $)
|
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
Property, Plant and Equipment [Line Items] | |||
Depreciation and amortization expense on property and equipment | $ 3,206,000us-gaap_DepreciationAndAmortization | $ 3,043,000us-gaap_DepreciationAndAmortization | $ 2,981,000us-gaap_DepreciationAndAmortization |
Capital lease obligations | 0us-gaap_CapitalLeaseObligations | ||
Furniture, fixtures, and equipment [Member] | |||
Property, Plant and Equipment [Line Items] | |||
Fully depreciated no longer in use furniture, fixtures and equipment write-off |
$ 7,700,000mmi_FullyDepreciatedNoLongerInUseFurnitureFixturesAndEquipmentWriteOff / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_FurnitureAndFixturesMember |
X | ||||||||||
- Definition
Write-off of disposed fully depreciated no longer in use furniture, fixtures and equipment No definition available.
|
X | ||||||||||
- Definition
Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|