Earnings Per Share and Dividends - Reconciliation of the numerator and denominator used in basic and diluted EPS calculations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 5,201	$ 3,489	$ 6,293	$ 6,120
RMCO, LLC
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 5,201	$ 3,489	$ 6,293	$ 6,120
Common Class A
Denominator for basic net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,719,477	18,123,963	18,608,005	18,049,114
Denominator for diluted net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,719,477	18,123,963	18,608,005	18,049,114
Add dilutive effect of the following:
Weighted average shares of Class A common stock outstanding, diluted	18,941,343	18,146,886	18,904,036	18,090,259
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.28	$ 0.19	$ 0.34	$ 0.34
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.27	$ 0.19	$ 0.33	$ 0.34
Restricted stock
Add dilutive effect of the following:
Restricted stock	221,866	22,923	296,031	41,145