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Investment Securities Available For Sale, at Fair Value - Proceeds from Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	$ 24,772	$ 36,215	$ 25,367	$ 60,589
Realized Gains	0	18,001	0	18,375
Realized Losses	(1,035)	0	(1,076)	0
Net Realized Gains (Losses)	(1,035)	18,001	(1,076)	18,375
CMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	24,772		24,772
Realized Gains	0		0
Realized Losses	(1,035)		(1,035)
Net Realized Gains (Losses)	$ (1,035)		(1,035)
ABS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds		36,215	595	36,215
Realized Gains		18,001	0	18,001
Realized Losses		0	(41)	0
Net Realized Gains (Losses)		$ 18,001	$ (41)	18,001
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds				24,374
Realized Gains				374
Realized Losses				0
Net Realized Gains (Losses)				$ 374

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Proceeds Including Receivable For Unsettled Trades From Sale of Debt Securities, Available-for-sale

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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