Securities, at Fair Value - Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Interest income	$ 56,690	$ 90,094	$ 327,201
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	0	14,038	82,446
Effective yield adjustment	0	(5,186)	(26,545)
Interest income	0	8,852	55,901
Legacy Non-Agency MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	14	18,263	87,024
Effective yield adjustment	670	10,565	59,622
Interest income	684	28,828	146,646
Accretion income	670		14,500
RPL/NPL MBS
Debt Securities, Available-for-sale [Line Items]
Coupon interest	373	8,376	53,086
Effective yield adjustment	8,136	560	338
Interest income	8,509	8,936	53,424
Accretion income	8,100		329
CRT securities
Debt Securities, Available-for-sale [Line Items]
Coupon interest	3,690	7,010	20,532
Effective yield adjustment	4,459	511	(1,949)
Interest income	8,149	7,521	18,583
MSR related assets
Debt Securities, Available-for-sale [Line Items]
Coupon interest	7,462	25,970	52,644
Effective yield adjustment	31,886	9,987	3
Interest income	39,348	$ 35,957	$ 52,647
Accretion income	$ 20,500

Accretion Income

No definition available.

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- Definition

Represents the coupon interest income derived from securities backed by a pool of mortgages or trust deeds.

+ References

No definition available.

+ Details

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- Definition

Represents the following effective yield adjustments pertaining to mortgage backed securities. (1) For Agency MBS, this reflects net premium amortization and discount accretion based on actual prepayment activity. (2) For Non-Agency MBS, this is the difference between the net income calculated using the net yield, which is based on management's estimates of future cash flows, less the current coupon yield.

+ References

No definition available.

+ Details

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- Definition

Amount of operating interest income, including amortization and accretion of premiums and discounts, on securitized, pass-through debt securities collateralized by real estate mortgage loans.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.2)
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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