Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 491	$ 491
Operating Leases, Future Minimum Payments, Due in Two Years	844	844
Operating Leases, Future Minimum Payments, Due in Three Years	799	799
Operating Leases, Future Minimum Payments, Due in Four Years	793	793
Operating Leases, Future Minimum Payments, Due in Five Years	695	695
Operating Leases, Future Minimum Payments, Due Thereafter	953	953
Operating Leases, Future Minimum Payments Due	4,575	4,575
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(819)	(819)
Operating Lease, Liability	$ 3,756	$ 3,756	$ 4,058
Operating Lease, Weighted Average Remaining Lease Term	5 years 4 months 24 days	5 years 4 months 24 days	5 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	7.20%	7.20%	7.20%
Operating Lease, Right-of-Use Asset	$ 3,507	$ 3,507	$ 3,838
Operating Lease, Expense	300	600
Loan commitments, at fair value	3,800	3,800	3,060
Investment in Other Loan Originator
Other Commitments [Line Items]
Unfunded commitment	5,100	5,100	6,500
Non-Exchange Traded Equity Investment in Mortgage Originators [Member] | Related party mortgage originator (with flow mortgage loan purchase and sale agreement) [Member]
Other Commitments [Line Items]
Maximum guarantees	15,000	15,000
Equity investments in securitization-related risk retention vehicle
Other Commitments [Line Items]
Maximum guarantees	15,500	15,500
Drawn down amount being guaranteed	3,500	3,500	10,800
Reverse mortgage loans
Other Commitments [Line Items]
Contractual Obligation	1,800,000	1,800,000	1,700,000
Residential mortgage loans
Other Commitments [Line Items]
Unfunded commitment	214,900	214,900	175,700
Residential mortgage loans | Investment in unconsolidated entities
Other Commitments [Line Items]
Unfunded commitment	116,900	116,900	181,400
Total Purchase Commitment		650,000
Corporate loan [Member]
Other Commitments [Line Items]
Unfunded commitment	3,100	3,100	4,200
Corporate loan [Member] | Line of Credit
Other Commitments [Line Items]
Unfunded commitment	$ 900	900	$ 900
Lending Commitment		$ 1,000