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Financing Agreements - Pledged Collateral (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 8,491,196
Accrued interest on assets	28,000	$ 25,700
Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		8,019,405
Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	1,231,748
Non-Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		1,426,051
Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	3,304,498
Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		3,556,273
Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	3,954,950
Securitized | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		3,037,081
Residential whole loans, at carrying value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	2,036,792
Residential whole loans, at carrying value | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		2,629,919
Residential whole loans, at carrying value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	362,312
Residential whole loans, at carrying value | Non-Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		693,982
Residential whole loans, at carrying value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	472,189
Residential whole loans, at carrying value | Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		459,349
Residential whole loans, at carrying value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	1,202,291
Residential whole loans, at carrying value | Securitized | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		1,476,588
Residential whole loans, at fair value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	6,127,108
Residential whole loans, at fair value | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		5,042,356
Residential whole loans, at fair value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	849,438
Residential whole loans, at fair value | Non-Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		706,377
Residential whole loans, at fair value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	2,558,534
Residential whole loans, at fair value | Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		2,810,865
Residential whole loans, at fair value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	2,719,136
Residential whole loans, at fair value | Securitized | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		1,525,114
Securities, at fair value
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	245,613
Securities, at fair value | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		256,685
Securities, at fair value | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	0
Securities, at fair value | Non-Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		0
Securities, at fair value | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	245,613
Securities, at fair value | Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		256,685
Securities, at fair value | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	0
Securities, at fair value | Securitized | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		0
Other assets: REO
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	81,683
Other assets: REO | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		90,445
Other assets: REO | Non-Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	19,998
Other assets: REO | Non-Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		25,692
Other assets: REO | Mark-to-Market
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	28,162
Other assets: REO | Mark-to-Market | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		29,374
Other assets: REO | Securitized
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements	$ 33,523
Other assets: REO | Securitized | Asset Pledged as Collateral with Right
Debt Instrument [Line Items]
Fair value of securities pledged as collateral under financing agreements		$ 35,379

X

- Definition

Sum of the fair values as of the date of the latest financial statement presented of securities pledged as collateral and the amount of interest receivable on the securities pledged as collateral.

+ References

No definition available.

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- Definition

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+ References

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- Definition

Fair value of securities pledged as collateral against securities sold under agreement to repurchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 12
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226013-175313

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