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Collateralized Debt Obligations - Schedule of Mortgages Payable in Consolidated VIEs (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
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	$ 3,448,137		$ 3,448,137		$ 3,070,314
Carrying Value	3,364,600		3,364,600		2,978,444
Collateralized Debt Obligations | Secured Debt | Consolidated SLST
Debt Instrument [Line Items]
Outstanding Face Amount	1,095,309		1,095,309		867,004
Carrying Value	$ 1,031,897		$ 1,031,897		$ 811,591
Weighted average interest rate	3.35%		3.35%		3.49%
Collateralized Debt Obligations | Secured Debt | Consolidated SLST | Interest Rate Step-Up
Debt Instrument [Line Items]
Outstanding Face Amount	$ 1,800,000		$ 1,800,000
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations
Debt Instrument [Line Items]
Outstanding Face Amount	1,543,302		1,543,302		$ 1,281,896
Carrying Value	$ 1,526,481		$ 1,526,481		$ 1,253,332
Weighted average interest rate	5.73%		5.73%		5.72%
Unrealized (losses) gains recognized on CDOs	$ (7,400)	$ (100)	$ (12,000)	$ 1,500
Collateralized Debt Obligations | Secured Debt | Residential loan securitizations at amortized cost, net
Debt Instrument [Line Items]
Outstanding Face Amount	741,397		741,397		$ 850,547
Carrying Value	$ 738,121		$ 738,121		$ 842,764
Weighted average interest rate	4.39%		4.39%		4.35%
Collateralized Debt Obligations | Secured Debt | Non-Agency RMBS re-securitization at fair value
Debt Instrument [Line Items]
Outstanding Face Amount	$ 68,129		$ 68,129		$ 70,867
Carrying Value	$ 68,101		$ 68,101		$ 70,757
Weighted average interest rate	7.38%		7.38%		7.38%

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