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Financing Agreements - Borrowings Under Repurchase Agreement (Details) - Repurchase Agreement Borrowings - Held at Fair Value - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 3,488,124	$ 3,227,558
Weighted Average Interest Rate	7.37%	6.58%
Within 30 days
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 3,435,884	$ 3,060,111
Weighted Average Interest Rate	7.38%	6.60%
Over 30 days to 3 months
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 52,240	$ 167,447
Weighted Average Interest Rate	6.63%	6.19%
Over 3 months to 12 months
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0	$ 0
Weighted Average Interest Rate	0.00%	0.00%
Over 12 months
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 0	$ 0
Weighted Average Interest Rate	0.00%	0.00%

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- Definition

Financing Agreements, Liabilities

+ References

No definition available.

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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
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(m)(1)(ii)(A)(ii))
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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