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Investment Securities Available for Sale, at Fair Value - Proceeds from Sale (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	$ 24,374	$ 111,628
Realized Gains	374	5,208
Realized Losses	0	(833)
Net Realized Gains (Losses)	374	4,375
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds	24,374	72,083
Realized Gains	374	12
Realized Losses	0	(833)
Net Realized Gains (Losses)	$ 374	(821)
CMBS
Debt Securities, Available-for-sale [Line Items]
Sales Proceeds		39,545
Realized Gains		5,196
Realized Losses		0
Net Realized Gains (Losses)		$ 5,196

X

- Definition

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

+ References

No definition available.

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X

- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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- Definition

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
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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- Definition

Amount of realized 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/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563

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+ References

No definition available.

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