Derivative Financial Instruments - Fair Value by Balance Sheet Grouping (Parenthetical) (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] | ||
| Amortized cost | $ 3,943,220 | $ 2,982,228 |
| Fair Value Hedging [Member] | ||
| Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] | ||
| Amortized cost | 1,586,924 | 1,719,962 |
| Cumulative basis adjustments for fair value hedge | (22,200) | 10,900 |
| Discontinued fair value hedge, Cumulative | 1,400 | 1,500 |
| Notional amount | $ 700,000 | $ 700,000 |
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- Definition Cumulative basis Adjustments for Fair Value Hedge No definition available.
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Nominal or face amount used to calculate payment on derivative. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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