Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information
Total revenue	$ 71,381	$ 54,277	$ 142,559	$ 106,919
RE/MAX Franchising
Segment Reporting Information
Total revenue	50,385	52,110	100,209	103,704
Marketing Funds fees
Segment Reporting Information
Total revenue	18,060	0	36,832	0
Other
Segment Reporting Information
Total revenue	2,936	2,167	5,518	3,215
Continuing franchise fees
Segment Reporting Information
Total revenue	24,894	25,211	49,850	50,451
Continuing franchise fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	23,978	24,761	48,095	49,562
Annual dues
Segment Reporting Information
Total revenue	8,819	8,973	17,673	17,669
Annual dues | RE/MAX Franchising
Segment Reporting Information
Total revenue	8,819	8,973	17,673	17,669
Broker fees
Segment Reporting Information
Total revenue	13,459	13,993	22,047	23,181
Broker fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	13,459	13,994	22,047	23,181
Franchise sales and other revenue
Segment Reporting Information
Total revenue	6,149	6,100	16,157	15,618
Franchise sales and other revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue	$ 4,129	$ 4,382	$ 12,394	$ 13,292