Non-controlling Interest - Net income reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Minority Interest [Line Items]
Weighted average ownership percentage of controlling interest	59.10%		58.60%		59.00%	58.60%
Weighted average ownership percentage of noncontrolling interest	40.90%		41.40%		41.00%	41.40%
Total (as a percentage)	100.00%		100.00%		100.00%	100.00%
Income before provision for income taxes attributable to RE/MAX Holdings, Inc.	$ 3,895		$ 11,328		$ 9,447	$ 17,286
Income before provision for income taxes: Non-controlling interest	2,735		7,991		6,263	12,198
Income before provision for income taxes	6,630		19,319		15,710	29,484
Provision for income taxes attributable to RE/MAX Holdings, Inc.	(406)		(2,758)		(3,327)	(4,307)
Provision for income taxes: Non-controlling interest	(300)		(428)		(1,169)	(787)
Provision for income taxes	(706)		(3,186)		(4,496)	(5,094)
Net income attributable to RE/MAX Holdings, Inc.	3,489		8,570		6,120	12,979
Net income: Non-controlling interest	2,435		7,563		5,094	11,411
Net income	5,924	$ 5,290	16,133	$ 8,257	11,214	24,390
RMCO, LLC
Minority Interest [Line Items]
Net income attributable to RE/MAX Holdings, Inc.	3,489		8,570		6,120	12,979
Net income: Non-controlling interest	2,435		7,563		5,094	11,411
Net income	$ 5,924		$ 16,133		$ 11,214	$ 24,390