Segment Information - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Selling, General and Administrative Expense, Total	$ 152,258	$ 171,548	$ 173,980
Marketing Funds fees	78,983	83,861	90,319
Real Estate | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Personnel	79,919	81,900	88,772
Professional fees	10,850	13,450	16,002
Lease costs	6,317	7,140	7,908
Events, travel and related costs	15,307	19,734	17,200
Other segment items	17,649	25,145	21,920
Selling, General and Administrative Expense, Total	130,042	147,369	151,802
Adjustments to arrive at segment expense in Adjusted EBITDA	(18,853)	(24,492)	(30,831)
Total expense in Adjusted EBITDA	111,189	122,877	120,971
Mortgage | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Personnel	14,240	14,134	11,865
Professional fees	1,394	1,237	1,179
Lease costs	439	460	408
Events, travel and related costs	2,721	3,118	2,234
Other segment items	3,291	3,495	4,296
Selling, General and Administrative Expense, Total	22,085	22,444	19,982
Adjustments to arrive at segment expense in Adjusted EBITDA	(2,403)	(1,531)	(1,226)
Total expense in Adjusted EBITDA	19,682	20,913	18,756
Other | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Selling, General and Administrative Expense, Total	131	1,735	2,196
Marketing Funds fees | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated
Marketing Funds fees	$ 78,983	$ 83,861	$ 90,319