Quarterly Financial Information - Schedule of Quarterly Financial Information (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
Quarterly Financial Information [Line Items]
Total revenue	$ 68,193	$ 71,541	$ 71,381	$ 71,178	$ 50,841	$ 54,866	$ 54,277	$ 52,642	$ 282,293	$ 212,626	$ 193,714
Total operating expenses	58,213	48,097	49,311	58,233	29,428	33,059	33,363	38,925	213,854	134,775	95,382
Operating income	9,980	23,444	22,070	12,945	21,413	21,807	20,914	13,717	68,439	77,851	98,332
Total other expenses, net	(2,416)	(2,727)	(2,751)	(2,780)	(2,977)	(2,846)	(3,176)	(2,688)	(10,674)	(11,687)	(9,470)
Income before provision for income taxes	7,564	20,717	19,319	10,165	18,436	18,961	17,738	11,029	57,765	66,164	88,862
Provision for income taxes	(2,362)	(3,453)	(3,186)	(1,908)	(7,507)	(3,555)	(3,283)	(1,997)	(10,909)	(16,342)	(57,542)
Net income	5,202	17,264	16,133	8,257	10,929	15,406	14,455	9,032	46,856	49,822	31,320
Less: net income attributable to non-controlling interest (note 4)	2,314	8,091	7,563	3,848	4,695	7,307	6,848	4,089	21,816	22,939	21,221
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
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
Diluted	$ 0.16	$ 0.51	$ 0.48	$ 0.25	$ 0.35	$ 0.46	$ 0.43	$ 0.28	$ 1.40	$ 1.51	$ 0.57
Weighted average shares of Class A common stock outstanding
Basic	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
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