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								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator
Net income attributable to RE/MAX Holdings, Inc.	$ 2,888	$ 9,173	$ 8,570	$ 4,409	$ 6,234	$ 8,099	$ 7,607	$ 4,943	$ 25,040	$ 26,883	$ 10,099
Common Class A
Denominator for basic net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	17,837,386	17,826,332	17,808,321	17,775,381	17,748,745	17,746,184	17,746,042	17,709,095	17,812,065	17,737,649	17,688,533
Denominator for diluted net income per share of Class A common stock
Weighted average shares of Class A common stock outstanding	17,837,386	17,826,332	17,808,321	17,775,381	17,748,745	17,746,184	17,746,042	17,709,095	17,812,065	17,737,649	17,688,533
Add dilutive effect of the following:
Weighted average shares of Class A common stock outstanding, diluted	17,978,431	17,840,158	17,833,958	17,817,620	17,771,180	17,771,212	17,769,641	17,762,133	17,867,752	17,767,499	17,731,800
Earnings per share of Class A common stock
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ 0.16	$ 0.51	$ 0.48	$ 0.25	$ 0.35	$ 0.46	$ 0.43	$ 0.28	$ 1.41	$ 1.52	$ 0.57
Net income attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ 0.16	$ 0.51	$ 0.48	$ 0.25	$ 0.35	$ 0.46	$ 0.43	$ 0.28	$ 1.40	$ 1.51	$ 0.57
Restricted Stock Units (RSUs) | Common Class A
Add dilutive effect of the following:
Restricted stock units									55,687	29,850	43,267