Non-controlling Interest - Net income reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Minority Interest [Line Items]
Weighted average ownership percentage of controlling interest	58.90%	58.60%
Weighted average ownership percentage of noncontrolling interest	41.10%	41.40%
Total (as a percentage)	100.00%	100.00%
Income before provision for income taxes attributable to RE/MAX Holdings, Inc.	$ 5,552	$ 5,958
Income before provision for income taxes: Non-controlling interest	3,528	4,207
Income before provision for income taxes	9,080	10,165
Provision for income taxes attributable to RE/MAX Holdings, Inc.	(2,921)	(1,549)
Provision for income taxes: Non-controlling interest	(869)	(359)
Provision for income taxes	(3,790)	(1,908)
Net income attributable to RE/MAX Holdings, Inc.	2,631	4,409
Net income: Non-controlling interest	2,659	3,848
Net income	5,290	8,257
RMCO, LLC
Minority Interest [Line Items]
Net income attributable to RE/MAX Holdings, Inc.	2,631	4,409
Net income: Non-controlling interest	2,659	3,848
Net income	$ 5,290	$ 8,257