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Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Summary of core deposit intangibles and other intangibles |  |  |  |  |  |
Amortization of Intangible Assets | $ 2,203 | $ 2,203 | $ 6,608 | $ 6,608 |  |
Core Deposits [Member] |  |  |  |  |  |
Summary of core deposit intangibles and other intangibles |  |  |  |  |  |
Finite-Lived Core Deposits, Gross |  |  |  |  | $ 88,109 | $ 88,109
Finite-Lived Intangible Assets, Accumulated Amortization | (63,057) |  | (63,057) |  | (56,449) |
Finite-Lived Intangible Assets, Net, Total | $ 25,052 |  | 25,052 |  | 31,660 |
Amortization of Intangible Assets |  |  | $ 6,608 |  | $ 8,811 |

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