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Repurchase Agreements - Repurchase Agreements Secured by Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | $ 144,852 |
Fair Value of Loans Pledged | 3,953,427 | $ 3,575,601
Repurchase agreements |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 144,852 |
Fair Value of Loans Pledged | 281,267 |
Amortized Cost of Collateral Pledged | 302,142 |
Non-Agency RMBS | Repurchase agreements |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 127,900 |
Fair Value of Loans Pledged | 249,691 |
Amortized Cost of Collateral Pledged | 269,542 |
Restricted cash | 5,500 |
Non-Agency RMBS | Repurchase agreements | Consolidated SLST |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Fair Value of Loans Pledged | 198,000 |
CMBS | Repurchase agreements |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |
Outstanding Repurchase Agreements | 16,952 |
Fair Value of Loans Pledged | 31,576 |
Amortized Cost of Collateral Pledged | $ 32,600 |

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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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- Definition 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 http://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 http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition 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 http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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