Segment Information - Revenue (Details) - USD ($) $ 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
Segment Reporting Information
Total revenue	$ 68,193	$ 71,541	$ 71,381	$ 71,178	$ 50,841	$ 54,866	$ 54,277	$ 52,642	$ 282,293	$ 212,626	$ 193,714
RE/MAX Franchising
Segment Reporting Information
Total revenue									199,635	204,504	193,157
Motto Franchising
Segment Reporting Information
Total revenue									4,543	2,536	557
Marketing Funds fees
Segment Reporting Information
Total revenue									72,299
Other
Segment Reporting Information
Total revenue									5,816	5,586
Continuing franchise fees
Segment Reporting Information
Total revenue									99,928	101,104	93,694
Continuing franchise fees | RE/MAX Franchising
Segment Reporting Information
Total revenue									95,853	98,828	93,232
Continuing franchise fees | Motto Franchising
Segment Reporting Information
Total revenue									4,075	2,276	462
Annual dues
Segment Reporting Information
Total revenue									35,409	35,894	33,767
Annual dues | RE/MAX Franchising
Segment Reporting Information
Total revenue									35,409	35,894	33,767
Broker fees
Segment Reporting Information
Total revenue									45,990	46,871	43,801
Broker fees | RE/MAX Franchising
Segment Reporting Information
Total revenue									45,990	46,871	43,801
Franchise sales and other revenue
Segment Reporting Information
Total revenue									28,667	28,757	22,452
Franchise sales and other revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue									22,383	22,911	22,357
Franchise sales and other revenue | Motto Franchising
Segment Reporting Information
Total revenue									$ 468	$ 260	$ 95