Segment Reporting - Service Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	$ 125,825	$ 105,385	$ 154,596
Title
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	40,202	23,265	14,185
Valuation
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	32,459	21,749	27,549
Single family rental
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	27,291	17,159	16,011
Asset management workflow platform
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	5,348	7,707	9,951
REO asset management
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	2,381	5,518	5,930
Other real estate services
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	320	2,770	2,862
Mortgage
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	17,670	14,682	7,632
All Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Services revenue	$ 154	$ 12,535	$ 70,476