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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 11,250	$ 25,280	$ 27,134
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.62	$ 1.42	$ 1.53
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.61	$ 1.41	$ 1.53
RMCO, LLC
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 11,250	$ 25,280	$ 27,134
Common Class A
Denominator for basic net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,170,348	17,812,065	17,737,649
Denominator for diluted net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,170,348	17,812,065	17,737,649
Add dilutive effect of the following:
Weighted average shares of Class A common stock outstanding, diluted	18,324,246	17,867,752	17,767,499
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.62	$ 1.42	$ 1.53
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.61	$ 1.41	$ 1.53
Restricted stock
Add dilutive effect of the following:
Restricted stock	153,898	55,687	29,850