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Repurchase Agreements (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets Sold under Agreements to Repurchase, Repurchase Liability | $ 2,437,163 | $ 4,752,348
Weighted Average Rate | 0.34% | 2.01%
Fair Value of Collateral Pledged | $ 2,609,075 | $ 5,024,625
Payable for unsettled securities | 5 | 6,180
Receivable for securities sold | 150,432 | 0
Repurchase agreement amount for which securities sold but unsettled as of reporting date are pledged as collateral. | 140,612 |
Amortized cost of securities sold but unsettled | 141,215 |
Agency | Commercial Mortgage Backed Securities |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets Sold under Agreements to Repurchase, Repurchase Liability | $ 237,649 | $ 1,735,848
Weighted Average Rate | 0.23% | 1.98%
Fair Value of Collateral Pledged | $ 255,741 | $ 1,901,452
Agency | Residential Mortgage Backed Securities |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets Sold under Agreements to Repurchase, Repurchase Liability | $ 1,874,176 | $ 2,594,645
Weighted Average Rate | 0.23% | 1.96%
Fair Value of Collateral Pledged | $ 1,973,608 | $ 2,647,638
Agency | Interest-Only-Strip |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets Sold under Agreements to Repurchase, Repurchase Liability | $ 209,393 | $ 255,912
Weighted Average Rate | 0.90% | 2.30%
Fair Value of Collateral Pledged | $ 243,042 | $ 282,522
Non-Agency | Interest-Only-Strip |  |
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] |  |
Assets Sold under Agreements to Repurchase, Repurchase Liability | $ 115,945 | $ 165,943
Weighted Average Rate | 1.28% | 2.67%
Fair Value of Collateral Pledged | $ 136,684 | $ 193,013

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- Definition Repurchase agreement amount outstanding for which securities sold but not settled as of the reporting date are pledged as collateral. + References No definition available. + Details
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- Definition Amount payable to other broker-dealer and clearing organization, including, but not limited to, security failed-to-receive, deposit received for security loaned, open transaction, and floor-brokerage payable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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- Definition Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Interest rate on the 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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