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Financing Agreements (Borrowings Under Repurchase Agreement) (Details) - Repurchase Agreement Borrowings - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 1,651,820 | $ 2,494,976
Weighted Average Interest Rate | 2.76% | 3.16%
Carrying Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 503,303 |
Weighted Average Interest Rate | 1.73% |
Within 30 days | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 1,651,820 | $ 2,494,976
Weighted Average Interest Rate | 2.76% | 3.16%
Within 30 days | Carrying Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 503,303 |
Weighted Average Interest Rate | 1.73% |
Over 30 days to 3 months | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 | $ 0
Weighted Average Interest Rate | 0.00% | 0.00%
Over 30 days to 3 months | Carrying Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 |
Weighted Average Interest Rate | 0.00% |
Over 3 months to 12 months | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 | $ 0
Weighted Average Interest Rate | 0.00% | 0.00%
Over 3 months to 12 months | Carrying Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 |
Weighted Average Interest Rate | 0.00% |
Over 12 months | Fair Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 | $ 0
Weighted Average Interest Rate | 0.00% | 0.00%
Over 12 months | Carrying Value |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 0 |
Weighted Average Interest Rate | 0.00% |

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- Definition Financing Agreements, Liabilities + References No definition available. + 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://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 + 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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