Segment Reporting - Service Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	$ 46,092	$ 92,216	$ 125,825
Valuation
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	17,139	33,724	32,459
Single-family rental
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	7,743	24,387	27,291
Asset management technology platform
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	4,639	4,814	5,535
Real estate owned asset management
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	3,960	3,091	2,370
Other real estate services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	30	115	144
Title
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	11,464	18,687	40,202
Real estate technology
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	29	8	0
Contract underwriting services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	1,088	1,775	5,676
Loan fulfillment services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	0	5,615	11,994
All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total services revenue	$ 0	$ 0	$ 154