Business and Organization (Details) - Minimum	Sep. 30, 2019 country item Office
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of agents \| item	128,000
Number of offices \| Office	8,000
Number of countries in which entity operates \| country	110

Organization consolidation and presentation of financial statements disclosure.

No definition available.

Name:	rmax_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix:	rmax_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration