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Derivative Instruments - Non-hedge Derivatives (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 28, 2024
Derivative [Line Items] |  |  |  |  |
Loss protection fee | 7.95% |  |  |  |
Credit Default Swap | Consumer Real Estate |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional |  |  |  |  | $ 1,700,000
Credit Default Swap, Buying Protection |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | $ 86,500 |  |  |  |
Not Designated as Hedging Instrument |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 5 |  | $ (308) | $ 53 |
Notional | 5,266,028 |  | 4,075,480 |  |
Estimated fair value | (731) | [1] | (744) |  |
Not Designated as Hedging Instrument | Assets |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 2,633,014 |  | 2,037,740 |  |
Estimated fair value | 62,494 | [1] | 66,462 |  |
Not Designated as Hedging Instrument | Liabilities |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional | 2,633,014 |  | 2,037,740 |  |
Estimated fair value | (63,225) | [1] | (67,206) |  |
Not Designated as Hedging Instrument | Credit Default Swap |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | 185 |  | 0 | $ 0 |
Notional | 81,993 |  | 0 |  | $ 86,500
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value | $ 185 |  | $ 0 |  |
[1] | The variation margin payments for derivatives cleared through central clearing houses are characterized as settlements. At December 31, 2024 and 2023, there were no interest rate swap agreements designated as non-hedge derivatives cleared through clearing houses.

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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