Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information
Total revenue	$ 52,207	$ 71,381	$ 122,479	$ 142,559
RE/MAX Franchising
Segment Reporting Information
Total revenue	38,371	50,385	88,276	100,209
Motto Franchising
Segment Reporting Information
Total revenue	1,070	1,030	2,528	1,989
Marketing Funds fees
Segment Reporting Information
Total revenue	11,765	18,060	29,287	36,832
Other
Segment Reporting Information
Total revenue	1,001	1,906	2,388	3,529
Continuing franchise fees
Segment Reporting Information
Total revenue	16,738	24,894	40,881	49,850
Continuing franchise fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	15,795	23,978	38,672	48,095
Continuing franchise fees | Motto Franchising
Segment Reporting Information
Total revenue	943	916	2,209	1,755
Annual dues
Segment Reporting Information
Total revenue	8,745	8,819	17,666	17,673
Annual dues | RE/MAX Franchising
Segment Reporting Information
Total revenue	8,745	8,819	17,666	17,673
Broker fees
Segment Reporting Information
Total revenue	10,426	13,459	19,870	22,047
Broker fees | RE/MAX Franchising
Segment Reporting Information
Total revenue	10,426	13,459	19,870	22,047
Franchise sales and other revenue
Segment Reporting Information
Total revenue	4,533	6,149	14,775	16,157
Franchise sales and other revenue | RE/MAX Franchising
Segment Reporting Information
Total revenue	3,405	4,129	12,068	12,394
Franchise sales and other revenue | Motto Franchising
Segment Reporting Information
Total revenue	$ 127	$ 114	$ 319	$ 234