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Collateralized Debt Obligations - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Maximum
Debt Instrument [Line Items]
Debt instrument, interest rate increases, months after issuance	48 months
Minimum
Debt Instrument [Line Items]
Debt instrument, interest rate increases, months after issuance	24 months
Step-Up Interest Rate One
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	1.00%
Step-Up Interest Rate Two
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	1.50%
Step-Up Interest Rate Three
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	2.00%
Step-Up Interest Rate Four
Debt Instrument [Line Items]
Debt instrument, interest rate increase, non-redemption	3.00%
Collateralized debt obligations | Secured debt
Debt Instrument [Line Items]
Outstanding Face Amount	$ 3,070,314	$ 1,944,948
Carrying value	2,978,444	1,870,517
Consolidated SLST | Collateralized debt obligations | Secured debt
Debt Instrument [Line Items]
Outstanding Face Amount	867,004	652,933
Carrying value	$ 811,591	$ 593,737
Weighted average interest rate (as a percent)	3.49%	2.75%
Consolidated SLST | Collateralized debt obligations | Secured debt | Interest Rate Step-Up
Debt Instrument [Line Items]
Outstanding Face Amount	$ 1,600,000
Residential loan securitizations at amortized cost, net | Collateralized debt obligations | Secured debt
Debt Instrument [Line Items]
Outstanding Face Amount	850,547	$ 1,292,015
Carrying value	$ 842,764	$ 1,276,780
Weighted average interest rate (as a percent)	4.35%	4.00%
Residential loan securitizations at fair value | Collateralized debt obligations | Secured debt
Debt Instrument [Line Items]
Outstanding Face Amount	$ 1,281,896
Carrying value	$ 1,253,332
Weighted average interest rate (as a percent)	5.72%
Unrealized gain (losses) recognized on CDOs	$ (1,500)
Non-Agency RMBS Re-Securitization At Fair Value | Collateralized debt obligations | Secured debt
Debt Instrument [Line Items]
Outstanding Face Amount	70,867
Carrying value	$ 70,757
Weighted average interest rate (as a percent)	7.38%

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