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Investment Securities Available For Sale, at Fair Value - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Investment securities available for sale accrued interest	$ 400	$ 700
Unrealized gains (losses) on investments	22,600	15,500	$ 9,700
Net realized loss	$ 18,344	$ 11,220	(61,529)
Contractual maturities	37 years
Available for sale securities portfolio, weighted average life	7 years 7 months 6 days	5 years 9 months 18 days
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Net realized loss	$ 374	$ 4,069	$ (34,421)
Non Agency RMBS Held In Securitization Trust | Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Net realized loss		$ (5,500)

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Represents the weighted average life of the available for sale securities portfolio.

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Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Topic 326
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Indicates line item in statement of financial position that includes accrued interest, after allowance for credit loss, on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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Amount of unrealized gain (loss) 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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