Earnings (Loss) 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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator
Net income (loss) attributable to RE/MAX Holdings, Inc.	$ (25,149)	$ 3,617	$ (18,725)	$ 9,883
RMCO, LLC
Numerator
Net income (loss) attributable to RE/MAX Holdings, Inc.	$ (25,149)	$ 3,617	$ (18,725)	$ 9,883
Common Class A
Denominator for basic net income (loss) per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,739,564	18,196,454	18,651,858	18,098,227
Denominator for diluted net income (loss) per share of Class A common stock
Weighted average shares of Class A common stock outstanding	18,739,564	18,196,454	18,651,858	18,098,227
Add dilutive effect of the following:
Weighted average shares of Class A common stock outstanding, diluted	18,739,564	18,368,051	18,651,858	18,182,856
Earnings (loss) per share of Class A common stock
Net income (loss) attributable to RE/MAX Holdings, Inc. per share of Class A common stock, basic	$ (1.34)	$ 0.20	$ (1.00)	$ 0.55
Net income (loss) attributable to RE/MAX Holdings, Inc. per share of Class A common stock, diluted	$ (1.34)	$ 0.20	$ (1.00)	$ 0.54
Restricted stock
Add dilutive effect of the following:
Restricted stock		171,597		84,629