| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
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Fair Value Measurements at September 30, 2026 Using
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Quoted Prices in
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Active Markets
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Significant Other
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Significant
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for Identical
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Observable Inputs
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Unobservable
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Assets (Level 1)
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(Level 2)
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Inputs (Level 3)
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Total
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Assets Measured on a Recurring Basis:
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(In Thousands)
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Available for sale debt securities:
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U.S. Treasury securities
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$ |
438,386 |
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$ |
- |
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$ |
- |
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$ |
438,386 |
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Mortgage-backed securities
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- |
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147,489 |
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- |
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147,489 |
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State and municipal securities
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- |
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9,231 |
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- |
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9,231 |
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Corporate debt
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- |
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373,397 |
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- |
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373,397 |
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Total available-for-sale debt securities
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438,386 |
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530,117 |
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- |
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968,503 |
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Total assets at fair value
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$ |
438,386 |
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$ |
530,117 |
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$ |
- |
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$ |
968,503 |
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Fair Value Measurements at December 31, 2025 Using
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Quoted Prices in
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Active Markets
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Significant Other
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Significant
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for Identical
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Observable Inputs
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Unobservable
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Assets (Level 1)
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(Level 2)
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Inputs (Level 3)
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Total
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Assets Measured on a Recurring Basis:
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(In Thousands)
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Available for sale debt securities:
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U.S. Treasury securities
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$ |
522,923 |
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$ |
- |
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$ |
- |
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$ |
522,923 |
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Mortgage-backed securities
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- |
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133,304 |
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- |
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133,304 |
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State and municipal securities
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- |
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9,809 |
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- |
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9,809 |
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Corporate debt
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- |
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402,789 |
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- |
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402,789 |
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Total available-for-sale debt securities
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522,923 |
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545,902 |
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- |
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1,068,825 |
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Total assets at fair value
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$ |
522,923 |
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$ |
545,902 |
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$ |
- |
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$ |
1,068,825 |
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| Fair Value Measurements, Nonrecurring [Table Text Block] |
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Fair Value Measurements at September 30, 2026
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Quoted Prices in Active Markets for Identical Assets (Level 1)
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Significant Other Observable Inputs (Level 2)
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Significant Unobservable Inputs (Level 3)
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Total
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Assets Measured on a Nonrecurring Basis:
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(In Thousands)
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Loans individually evaluated
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$ |
- |
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$ |
- |
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$ |
150,121 |
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$ |
150,121 |
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Other real estate owned and repossessed assets
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- |
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- |
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14,865 |
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14,865 |
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Total assets at fair value
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$ |
- |
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$ |
- |
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$ |
164,986 |
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$ |
164,986 |
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Fair Value Measurements at December 31, 2025
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Quoted Prices in Active Markets for Identical Assets (Level 1)
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Significant Other Observable Inputs (Level 2)
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Significant Unobservable Inputs (Level 3)
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Total
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Assets Measured on a Nonrecurring Basis:
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(In Thousands)
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Loans individually evaluated
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$ |
- |
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$ |
- |
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$ |
186,825 |
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$ |
186,825 |
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Other real estate owned and repossessed assets
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- |
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- |
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2,583 |
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2,583 |
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Total assets at fair value
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$ |
- |
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$ |
- |
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$ |
189,408 |
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$ |
189,408 |
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| Fair Value, by Balance Sheet Grouping [Table Text Block] |
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September 30, 2026
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Carrying / Notional Amount
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Estimated Fair Value
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Quoted Market Prices in an Active Market (Level 1)
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Models with Significant Observable Market Parameters (Level 2)
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Models with Significant Unobservable Market Parameters (Level 3)
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(In Thousands)
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Financial Assets:
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Cash and due from banks
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$ |
122,417 |
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$ |
122,417 |
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$ |
122,417 |
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$ |
- |
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$ |
- |
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Interest-bearing balances due from depository institutions
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738,547 |
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738,547 |
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738,547 |
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- |
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- |
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Securities purchased with agreement to resell
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298,950 |
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298,950 |
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298,950 |
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- |
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- |
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Federal funds sold
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25,101 |
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25,101 |
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- |
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25,101 |
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- |
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Held to maturity U.S. Treasury securities
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224,785 |
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215,437 |
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215,437 |
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- |
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- |
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Held to maturity debt securities
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369,811 |
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317,668 |
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- |
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316,168 |
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1,500 |
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Mortgage loans held for sale
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15,273 |
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15,273 |
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- |
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15,273 |
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- |
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Restricted equity securities
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12,475 |
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12,475 |
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- |
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12,475 |
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- |
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Loans, net
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14,548,293 |
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14,433,136 |
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- |
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- |
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14,433,136 |
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Financial Liabilities:
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Deposits
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$ |
14,087,378 |
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$ |
14,081,830 |
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$ |
- |
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$ |
14,081,830 |
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$ |
- |
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Federal funds purchased
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1,965,000 |
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1,965,000 |
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- |
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1,965,000 |
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- |
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Other borrowings
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34,750 |
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31,734 |
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- |
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31,734 |
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- |
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December 31, 2025
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Carrying / Notional Amount
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Estimated Fair Value
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Quoted Market Prices in an Active Market (Level 1)
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Models with Significant Observable Market Parameters (Level 2)
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Models with Significant Unobservable Market Parameters (Level 3)
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(In Thousands)
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Financial Assets:
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Cash and due from banks
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$ |
95,127 |
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$ |
95,127 |
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$ |
95,127 |
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$ |
- |
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$ |
- |
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Interest-bearing balances due from depository institutions
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1,026,607 |
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1,026,607 |
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1,026,607 |
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- |
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- |
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Securities purchased with agreement to resell
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498,910 |
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498,910 |
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498,910 |
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- |
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- |
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Federal funds sold
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6,052 |
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6,052 |
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- |
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|
6,052 |
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- |
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Held to maturity U.S. Treasury securities
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|
249,621 |
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240,032 |
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|
240,032 |
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- |
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|
- |
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Held to maturity debt securities
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|
410,455 |
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|
376,503 |
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|
- |
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|
376,003 |
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|
500 |
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Mortgage loans held for sale
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|
11,744 |
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|
11,744 |
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- |
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|
11,744 |
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|
- |
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Restricted equity securities
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|
12,203 |
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|
12,203 |
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|
- |
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|
12,203 |
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|
- |
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Loans, net
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13,525,229 |
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13,267,169 |
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- |
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- |
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13,267,169 |
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Financial Liabilities:
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
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Deposits
|
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$ |
14,219,034 |
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$ |
14,217,711 |
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$ |
- |
|
|
$ |
14,217,711 |
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$ |
- |
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Federal funds purchased
|
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|
1,471,628 |
|
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|
1,471,628 |
|
|
|
- |
|
|
|
1,471,628 |
|
|
|
- |
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Other borrowings
|
|
|
34,750 |
|
|
|
31,258 |
|
|
|
- |
|
|
|
31,258 |
|
|
|
- |
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|