Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information
Total revenue	$ 50,841	$ 54,866	$ 54,277	$ 52,642	$ 48,510	$ 49,071	$ 48,727	$ 47,406	$ 212,626	$ 193,714	$ 175,642
RE/MAX Franchising
Segment Reporting Information
Total revenue									204,504	193,157	175,638
Other
Segment Reporting Information
Total revenue									8,122	557	4
Continuing franchise fees
Segment Reporting Information
Total revenue									101,104	93,694	81,197
Continuing franchise fees | RE/MAX Franchising
Segment Reporting Information
Total revenue									98,828	93,232	81,194
Annual dues
Segment Reporting Information
Total revenue									35,894	33,767	32,653
Annual dues | RE/MAX Franchising
Segment Reporting Information
Total revenue									35,894	33,767	32,653
Broker fees
Segment Reporting Information
Total revenue									46,871	43,801	37,209
Broker fees | RE/MAX Franchising
Segment Reporting Information
Total revenue									46,871	43,801	37,209
Franchise sales and other revenue
Segment Reporting Information
Total revenue									28,757	22,452	24,471
Franchise sales and other revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue									$ 22,911	$ 22,357	24,470
Brokerage revenue
Segment Reporting Information
Total revenue											112
Brokerage revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue											$ 112