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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 8,139	$ 3,717	$ 20,770	$ 15,715
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.46	$ 0.21	$ 1.17	$ 0.89
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.46	$ 0.21	$ 1.17	$ 0.89
Common Class A
Denominator for basic net income per share of common stock
Weighted average shares of Class A common stock outstanding	17,746,184	17,696,991	17,733,910	17,685,683
Denominator for diluted net income per share of common stock
Weighted average shares of Class A common stock outstanding	17,746,184	17,696,991	17,733,910	17,685,683
Add dilutive effect of the following:
Weighted average shares of Class A common stock outstanding, diluted	17,771,212	17,737,786	17,767,638	17,726,447
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.46	$ 0.21	$ 1.17	$ 0.89
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.46	$ 0.21	$ 1.17	$ 0.89
Restricted Stock Units (RSUs) | Common Class A
Add dilutive effect of the following:
Dilutive effect	25,028	40,795	33,728	40,764