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Investment Securities Available For Sale, at Fair Value - Realized Gain or Loss Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	$ 5,284	$ 64,690	$ 85,437
Realized Gains	21	1,472	18,375
Realized Losses	0	(14,072)	(31)
Net Realized Gains (Losses)	21	(12,600)	18,344
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	5,284	33,676	24,374
Realized Gains	21	1,472	374
Realized Losses	0	(12,644)	0
Net Realized Gains (Losses)	$ 21	(11,172)	374
ABS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds		595	36,215
Realized Gains		0	18,001
Realized Losses		(41)	0
Net Realized Gains (Losses)		(41)	18,001
CMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds		30,419
Realized Gains		0
Realized Losses		(1,387)
Net Realized Gains (Losses)		$ (1,387)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds			24,848
Realized Gains			0
Realized Losses			(31)
Net Realized Gains (Losses)			$ (31)

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