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Collateralized Debt Obligations - Schedule of Mortgages Payable in Consolidated VIEs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Carrying Value	$ 3,577,459		$ 3,577,459		$ 2,978,444
Minimum
Debt Instrument [Line Items]
Debt instrument, interest rate increases, months after issuance			24 months
Maximum
Debt Instrument [Line Items]
Debt instrument, interest rate increases, months after issuance			48 months
Step-Up Interest Rate One
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	1.00%		1.00%
Step-Up Interest Rate Two
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	1.50%		1.50%
Step-Up Interest Rate Three
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	3.00%		3.00%
Collateralized Debt Obligations | Secured Debt
Debt Instrument [Line Items]
Outstanding Face Amount	$ 3,665,092		$ 3,665,092		3,070,314
Carrying Value	3,577,459		3,577,459		2,978,444
Collateralized Debt Obligations | Secured Debt | Consolidated SLST
Debt Instrument [Line Items]
Outstanding Face Amount	1,074,080		1,074,080		867,004
Carrying Value	$ 1,016,952		$ 1,016,952		$ 811,591
Weighted average interest rate	3.36%		3.36%		3.49%
Collateralized Debt Obligations | Secured Debt | Consolidated SLST | Interest Rate Step-Up
Debt Instrument [Line Items]
Outstanding Face Amount	$ 2,000,000		$ 2,000,000
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations
Debt Instrument [Line Items]
Outstanding Face Amount	2,148,070		2,148,070		$ 1,281,896
Carrying Value	$ 2,118,581		$ 2,118,581		$ 1,253,332
Weighted average interest rate	5.34%		5.34%		5.72%
Unrealized losses recognized on CDOs	$ (8,800)	$ (19,500)	$ (20,900)	$ (18,000)
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations at amortized cost, net
Debt Instrument [Line Items]
Outstanding Face Amount	376,200		376,200		$ 850,547
Carrying Value	$ 375,164		$ 375,164		$ 842,764
Weighted average interest rate	3.73%		3.73%		4.35%
Collateralized Debt Obligations | Secured Debt | Non-Agency RMBS re-securitization at fair value
Debt Instrument [Line Items]
Outstanding Face Amount	$ 66,742		$ 66,742		$ 70,867
Carrying Value	$ 66,762		$ 66,762		$ 70,757
Weighted average interest rate	7.38%		7.38%		7.38%

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