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Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Finite-lived Intangible Assets [Roll Forward] |  |  |
Other intangible assets, gross |  | $ 23,140 | $ 23,140
Write-off of intangibles from sale of SBKI | $ (1,472) |  |
Less: accumulated amortization | (16,233) | (14,562) |
Balance, other intangible assets, net | 5,435 | 8,578 |
Core Deposits |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Other intangible assets, gross |  | 17,470 | 17,470
Less: accumulated amortization | (12,655) | (11,435) |
Balance, other intangible assets, net | 4,815 | 6,035 |
Customer Relationships |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Other intangible assets, gross |  | 5,670 | $ 5,670
Write-off of intangibles from sale of SBKI | (1,472) |  |
Less: accumulated amortization | (3,578) | (3,127) |
Balance, other intangible assets, net | $ 620 | $ 2,543 |

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