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v3.25.3

Investment Securities - Available for Sale and Held for Maturity Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-sale: [Abstract] |  |
Amortized Cost | $ 1,240,956 | $ 1,257,436
Gross Unrealized Gains | 2,827 | 690
Gross Unrealized (Losses) | (153,548) | (194,834)
Fair Value | 1,090,235 | 1,063,292
Held-to-maturity: [Abstract] |  |
Held-to-maturity | 2,290 | 2,279
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | 0 | 0
Fair Value | 2,290 | 2,279
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 163,905 | 212,513
Gross Unrealized Gains | 1 | 3
Gross Unrealized (Losses) | (11,147) | (21,158)
Fair Value | 152,759 | 191,358
Obligations of States and Political Subdivisions |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 326,020 | 324,046
Gross Unrealized Gains | 308 | 135
Gross Unrealized (Losses) | (53,820) | (56,441)
Fair Value | 272,508 | 267,740
Mortgage-backed Securities: GSE Residential |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 714,690 | 653,760
Gross Unrealized Gains | 2,515 | 552
Gross Unrealized (Losses) | (87,399) | (114,570)
Fair Value | 629,806 | 539,742
Other Securities |  |
Available-for-sale: [Abstract] |  |
Amortized Cost | 36,341 | 67,117
Gross Unrealized Gains | 3 | 0
Gross Unrealized (Losses) | (1,182) | (2,665)
Fair Value | 35,162 | 64,452
Other Investments |  |
Held-to-maturity: [Abstract] |  |
Held-to-maturity | 2,290 | 2,279
Gross Unrealized Gains | 0 | 0
Gross Unrealized (Losses) | 0 | 0
Fair Value | $ 2,290 | $ 2,279

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