Short and Long-Term Funding, Composition (Details) - USD ($) $ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Short-Term Debt [Abstract] | ||
| Federal Funds Purchased | $ 200,205 | $ 260,070 |
| Securities Sold under Agreements to Repurchase | 66,124 | 47,794 |
| Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total | 266,329 | 307,864 |
| Debt Instrument [Line Items] | ||
| Short-Term Debt | 266,329 | 307,864 |
| Senior Notes | 300,000 | 300,000 |
| Subordinated Debt | 295,768 | 301,760 |
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | (6,600) | (7,484) |
| Long-term Debt | 589,168 | 594,276 |
| TotalShortTermLongTermExcludingFHLB | 855,497 | 902,140 |
| Debt, Long-Term and Short-Term, Combined Amount | 4,816,609 | 4,170,234 |
| Advance from Federal Home Loan Bank [Abstract] | ||
| Advance from Federal Home Loan Bank | 3,454,500 | 2,855,250 |
| Long-Term Federal Home Loan Bank Advances | 506,612 | 412,844 |
| Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances | $ 3,961,112 | $ 3,268,094 |
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- Definition Total Short Term Long Term Excluding FHLB No definition available.
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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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 Amount of unamortized debt discount (premium) and debt issuance costs. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. No definition available.
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- Definition Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after offset of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of advance from Federal Home Loan Bank (FHLBank). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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