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Repurchase Agreements - Repurchase Agreements Secured by Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets Sold under Agreements to Repurchase [Line Items]
Outstanding Repurchase Agreements	$ 226,778	$ 50,077
Fair Value of Loans Pledged	3,374,856	3,525,080
Repurchase agreements
Assets Sold under Agreements to Repurchase [Line Items]
Outstanding Repurchase Agreements	226,778	50,077
Fair Value of Loans Pledged	368,876	170,551
Amortized Cost of Collateral Pledged	409,056	210,733
Agency RMBS | Repurchase agreements
Assets Sold under Agreements to Repurchase [Line Items]
Outstanding Repurchase Agreements	94,306	0
Fair Value of Loans Pledged	100,286	0
Amortized Cost of Collateral Pledged	99,278	0
Non-Agency RMBS | Repurchase agreements
Assets Sold under Agreements to Repurchase [Line Items]
Outstanding Repurchase Agreements	132,472	50,077
Fair Value of Loans Pledged	268,590	170,551
Amortized Cost of Collateral Pledged	309,778	$ 210,733
Non-Agency RMBS | Repurchase agreements | Residential Loan Securitizations
Assets Sold under Agreements to Repurchase [Line Items]
Amortized Cost of Collateral Pledged	99,200
Non-Agency RMBS | Repurchase agreements | Consolidated SLST
Assets Sold under Agreements to Repurchase [Line Items]
Amortized Cost of Collateral Pledged	$ 169,400

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Assets Sold Under Agreements To Repurchase, Amortized Cost Of Collateral Pledged

+ References

No definition available.

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Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(m)(1)(ii)(A)(ii))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(m)(1)(i))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column G))
-URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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