Distributions declared to non-controlling unitholders of RMCO, LLC.

No definition available.

Name:	rmax_DistributionsDeclaredToNonControllingUnitholders
Namespace Prefix:	rmax_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

+ References

+ Details

Name:	us-gaap_DividendsCommonStockCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=rmax_QuarterlyDividendMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Earnings Per Share and Dividends - Additional Information (Details) - USD ($)						3 Months Ended				6 Months Ended
	Aug. 02, 2017	May 31, 2017	Mar. 22, 2017	Jun. 02, 2016	Mar. 23, 2016	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Dividends Payable [Line Items]
Dividends declared and paid										$ 6,369,000
Common Class A
Dividends Payable [Line Items]
Common stock, shares outstanding						17,696,991				17,696,991		17,652,548
Cash dividends declared per share of Class A common stock						$ 0.18		$ 0.15		$ 0.36	$ 0.30
Common Class B
Dividends Payable [Line Items]
Common stock, shares outstanding						1				1		1
Quarterly dividend \| Common Class A
Dividends Payable [Line Items]
Cash dividends declared per share of Class A common stock	$ 0.18					$ 0.18	$ 0.18	$ 0.15	$ 0.15
Dividends declared and paid		$ 3,185,000	$ 3,184,000	$ 2,647,000	$ 2,638,000					$ 6,369,000	$ 5,285,000
Non-controlling interest \| Quarterly dividend \| Common Class A
Dividends Payable [Line Items]
Distributions declared to non-controlling unitholders		$ 2,261,000	$ 2,261,000	$ 1,884,000	$ 1,884,000