Non-controlling Interest - Net income reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Noncontrolling Interest
Weighted average ownership percentage of controlling interest	58.67%			58.56%			58.64%	58.54%
Weighted average ownership percentage of noncontrolling interest	41.33%			41.44%			41.36%	41.46%
Total (as a percentage)	100.00%			100.00%			100.00%	100.00%
Income before provision for income taxes attributable to RE/MAX Holdings, Inc.	$ 12,152			$ 11,096			$ 29,438	$ 27,916
Provision for income taxes attributable to RE/MAX Holdings, Inc.	(2,979)			(2,957)			(7,286)	(7,146)
Net income attributable to RE/MAX Holdings, Inc.	9,173			8,139			22,152	20,770
Income before provision for income taxes: Non-controlling interest	8,565			7,865			20,763	19,812
Provision for income taxes: Non-controlling interest	(474)			(463)			(1,261)	(1,283)
Net income: Non-controlling interest	8,091			7,402			19,502	18,529
Income before provision for income taxes	20,717			18,961			50,201	47,728
Provision for income taxes	(3,453)			(3,420)			(8,547)	(8,429)
Net income	$ 17,264	$ 16,133	$ 8,257	$ 15,541	$ 14,591	$ 9,167	$ 41,654	$ 39,299