Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information
Total revenue	$ 71,541	$ 54,866	$ 214,100	$ 161,785
RE/MAX Franchising
Segment Reporting Information
Total revenue	51,081	52,450	151,290	156,154
Marketing Funds fees
Segment Reporting Information
Total revenue	18,034	0	54,866	0
Other
Segment Reporting Information
Total revenue	2,426	2,416	7,944	5,631
Continuing franchise fees
Segment Reporting Information
Total revenue	25,168	25,495	75,018	75,946
Continuing franchise fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	24,096	24,836	72,191	74,398
Annual dues
Segment Reporting Information
Total revenue	8,835	9,106	26,508	26,775
Annual dues | RE/MAX Franchising
Segment Reporting Information
Total revenue	8,835	9,106	26,508	26,775
Broker fees
Segment Reporting Information
Total revenue	13,292	13,488	35,339	36,669
Broker fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	13,292	13,488	35,339	36,669
Franchise sales and other revenue
Segment Reporting Information
Total revenue	6,212	6,777	22,369	22,395
Franchise sales and other revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue	$ 4,858	$ 5,020	$ 17,252	$ 18,312