Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Other Commitments [Line Items]
Loan commitments, at fair value	$ 8,785		$ 8,785		$ 6,692
Operating Lease, Expense	300	$ 400	600	$ 800
Operating Lease, Right-of-Use Asset	4,132		4,132		5,161
Operating Lease, Liability	$ 4,642		$ 4,642		$ 5,704
Operating Lease, Weighted Average Remaining Lease Term	7 years 6 months		7 years 6 months		7 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	9.19%		9.19%		8.87%
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 448		$ 448
Operating Leases, Future Minimum Payments, Due in Two Years	914		914
Operating Leases, Future Minimum Payments, Due in Three Years	923		923
Operating Leases, Future Minimum Payments, Due in Four Years	929		929
Operating Leases, Future Minimum Payments, Due in Five Years	948		948
Operating Leases, Future Minimum Payments, Due Thereafter	2,518		2,518
Operating Leases, Future Minimum Payments Due	6,680		6,680
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(2,038)		(2,038)
Loan Purchase Commitments, at Fair Value	4,009		4,009		$ 0
Affiliated REIT
Other Commitments [Line Items]
Purchase Commitment, Amount Contributed	25,000		25,000
Investment in Other Loan Originator
Other Commitments [Line Items]
Unfunded commitment	22,800		22,800		5,600
Mortgage Originator
Other Commitments [Line Items]
Unfunded commitment	361,300		361,300		369,000
Total Purchase Commitment			500,000
Mortgage loan originator
Other Commitments [Line Items]
Loan Purchase Commitments, at Fair Value	4,000		4,000		(1,600)
Non-Exchange Traded Equity Investment in Mortgage Originators [Member] | Related party mortgage originator (with flow mortgage loan purchase and sale agreement)
Other Commitments [Line Items]
Maximum guarantees	15,000		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					1,000
Reverse mortgage loans
Other Commitments [Line Items]
Contractual Obligation	2,200,000		2,200,000		2,100,000
Loan Purchase Commitments
Other Commitments [Line Items]
UPB of loans committed to purchase	470,500		470,500		352,700
Loan Purchase Commitments | Mortgage loan originator
Other Commitments [Line Items]
Loan Purchase Commitments, at Fair Value	1,100		1,100		(200)
UPB of loans committed to purchase	134,900		134,900		25,600
Loan Purchase Commitments | Mortgage loan originator B
Other Commitments [Line Items]
Loan Purchase Commitments, at Fair Value	400		400		(400)
UPB of loans committed to purchase	51,000		51,000		52,400
Residential mortgage loans
Other Commitments [Line Items]
Unfunded commitment	269,200		269,200		288,400
Corporate loan [Member]
Other Commitments [Line Items]
Unfunded commitment					2,600
Corporate loan [Member] | Line of Credit
Other Commitments [Line Items]
Unfunded commitment	$ 800		800		$ 900
Lending Commitment			$ 1,000