Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information
Total revenue	$ 74,467	$ 78,287
Real Estate
Segment Reporting Information
Total revenue	52,476	54,448
Mortgage
Segment Reporting Information
Total revenue	3,127	3,633
Operating Segments | Real Estate
Segment Reporting Information
Total revenue	52,476	54,448
Operating Segments | Mortgage
Segment Reporting Information
Total revenue	3,127	3,633
Operating Segments | Marketing Funds fees
Segment Reporting Information
Total revenue	18,864	20,206
Continuing franchise fees
Segment Reporting Information
Total revenue	29,351	31,085
Continuing franchise fees | Operating Segments | Real Estate
Segment Reporting Information
Total revenue	26,826	28,365
Continuing franchise fees | Operating Segments | Mortgage
Segment Reporting Information
Total revenue	2,525	2,720
Annual dues
Segment Reporting Information
Total revenue	7,789	8,225
Annual dues | Operating Segments | Real Estate
Segment Reporting Information
Total revenue	7,789	8,225
Broker fees
Segment Reporting Information
Total revenue	11,431	10,716
Broker fees | Operating Segments | Real Estate
Segment Reporting Information
Total revenue	11,431	10,716
Franchise sales and other revenue
Segment Reporting Information
Total revenue	7,032	8,055
Franchise sales and other revenue | Real Estate
Segment Reporting Information
Total revenue	6,430	7,142
Franchise sales and other revenue | Operating Segments | Real Estate
Segment Reporting Information
Total revenue	6,430	7,142
Franchise sales and other revenue | Operating Segments | Mortgage
Segment Reporting Information
Total revenue	$ 602	$ 913