Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information
Total revenue	$ 71,073	$ 71,541	$ 193,552	$ 214,100
Other
Segment Reporting Information
Total revenue	925	1,248	3,313	4,777
Operating Segments | RE/MAX Franchising
Segment Reporting Information
Total revenue	50,952	51,081	139,228	151,290
Operating Segments | Motto Franchising
Segment Reporting Information
Total revenue	1,906	1,178	4,434	3,167
Operating Segments | Marketing Funds fees
Segment Reporting Information
Total revenue	17,290	18,034	46,577	54,866
Operating Segments | Other
Segment Reporting Information
Total revenue	925	1,248	3,313	4,777
Continuing franchise fees
Segment Reporting Information
Total revenue	24,339	25,168	65,220	75,018
Continuing franchise fees | Operating Segments | RE/MAX Franchising
Segment Reporting Information
Total revenue	22,799	24,096	61,471	72,191
Continuing franchise fees | Operating Segments | Motto Franchising
Segment Reporting Information
Total revenue	1,540	1,072	3,749	2,827
Annual dues
Segment Reporting Information
Total revenue	8,638	8,835	26,304	26,508
Annual dues | Operating Segments | RE/MAX Franchising
Segment Reporting Information
Total revenue	8,638	8,835	26,304	26,508
Broker fees
Segment Reporting Information
Total revenue	15,457	13,292	35,327	35,339
Broker fees | Operating Segments | RE/MAX Franchising
Segment Reporting Information
Total revenue	15,457	13,292	35,327	35,339
Franchise sales and other revenue
Segment Reporting Information
Total revenue	5,349	6,212	20,124	22,369
Franchise sales and other revenue | Operating Segments | RE/MAX Franchising
Segment Reporting Information
Total revenue	4,058	4,858	16,126	17,252
Franchise sales and other revenue | Operating Segments | Motto Franchising
Segment Reporting Information
Total revenue	$ 366	$ 106	$ 685	$ 340