Non-controlling Interest - Net income reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Noncontrolling Interest
Weighted average ownership percentage of controlling interest	58.51%	58.44%
Weighted average ownership percentage of noncontrolling interest	41.49%	41.56%
Total (as a percentage)	100.00%	100.00%
Income before provision for income taxes attributable to RE/MAX Holdings, Inc.	$ 6,453	$ 7,252
Provision for income taxes attributable to RE/MAX Holdings, Inc.	(1,470)	(2,712)
Net income attributable to RE/MAX Holdings, Inc.	4,983	4,540
Income before provision for income taxes: Non-controlling interest	4,576	5,166
Provision for income taxes: Non-controlling interest	(392)	(318)
Net income: Non-controlling interest	4,184	4,848
Income before provision for income taxes	11,029	12,418
Provision for income taxes	(1,862)	(3,030)
Net income	$ 9,167	$ 9,388