Summary of Significant Accounting Policies - Services Provided to Marketing Funds by RE/MAX Franchising (Details) - Marketing funds - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Costs charged	$ 20,132	$ 17,789	$ 15,102
Technology - operating
Costs charged	13,396	12,245	6,244
Technology - capital
Costs charged	954	1,017	5,095
Marketing staff and administrative services
Costs charged	$ 5,782	$ 4,527	$ 3,763