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Collateralized Debt Obligations - Schedule of Mortgages Payable in Consolidated VIEs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
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%
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	3.00%
Collateralized Debt Obligations | Secured Debt
Debt Instrument [Line Items]
Outstanding Face Amount	$ 3,263,329		$ 3,070,314
Carrying Value	3,186,814		2,978,444
Collateralized Debt Obligations | Secured Debt | Consolidated SLST
Debt Instrument [Line Items]
Outstanding Face Amount	852,049		867,004
Carrying Value	$ 805,273		$ 811,591
Weighted average interest rate	3.40%		3.49%
Collateralized Debt Obligations | Secured Debt | Consolidated SLST | Interest Rate Step-Up
Debt Instrument [Line Items]
Outstanding Face Amount	$ 1,800,000
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations
Debt Instrument [Line Items]
Outstanding Face Amount	1,578,586		$ 1,281,896
Carrying Value	$ 1,554,353		$ 1,253,332
Weighted average interest rate	5.73%		5.72%
Unrealized (losses) gains recognized on CDOs	$ (4,700)	$ 1,600
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations at amortized cost, net
Debt Instrument [Line Items]
Outstanding Face Amount	763,188		$ 850,547
Carrying Value	$ 757,673		$ 842,764
Weighted average interest rate	4.38%		4.35%
Collateralized Debt Obligations | Secured Debt | Non-Agency RMBS re-securitization at fair value
Debt Instrument [Line Items]
Outstanding Face Amount	$ 69,506		$ 70,867
Carrying Value	$ 69,515		$ 70,757
Weighted average interest rate	7.38%		7.38%

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