|
Stock-Based Compensation Plans - Components of Stock-Based Compensation Included in Condensed Consolidated Statements of Net and Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Share-based compensation expense - Independent contractors | $ 1,259us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims | $ 487us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims |
| Allocated share-based compensation expense | 1,907us-gaap_AllocatedShareBasedCompensationExpense | 717us-gaap_AllocatedShareBasedCompensationExpense |
| Employee Stock Purchase Plan [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Allocated share-based compensation expense |
62us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = mmi_EmployeeStockPurchasePlanMember |
|
| Restricted Stock [Member] | Non-employee directors [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Allocated share-based compensation expense |
59us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = mmi_NonEmployeeDirectorMember |
30us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_TitleOfIndividualAxis = mmi_NonEmployeeDirectorMember |
| Restricted Stock Units (RSUs) [Member] | Employees [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Allocated share-based compensation expense |
$ 527us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_EmployeeStockMember |
$ 200us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_EmployeeStockMember |
| X | ||||||||||
|
- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Details
|