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Business Combination - Narrative (Details) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 8 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 01, 2025 USD ($) $ / shares | Feb. 01, 2025 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Jan. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 64,449 | $ 44,185 | $ 64,449 | $ 64,449 | $ 44,185 |  | $ 44,185 | $ 44,185
Proceeds from sales of investment securities available for sale |  |  |  |  |  | 98,272 | 14,336 |  |  |
Repayments of Long-term Debt |  |  |  |  |  | 40,188 | 0 |  |  |
Merger-related |  |  | $ 169 | $ 1,137 |  | $ 10,143 | $ 1,160 |  |  |
FHLB Borrowings |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-Sale, Weighted Average Yield | 5.07% | 5.07% |  |  |  |  |  |  |  |
Debt, Cost, Percentage | 4.73% | 4.73% |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 40,200 |  |  |  |  |  |  |  |
Traditions Bancorp, Inc. |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share |  | 0.7300 |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares | shares |  | 2,035,246 |  |  |  |  |  |  |  |
Business Combination, Price Per Share | $ / shares | $ 41.10 | $ 41.10 |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 83,806 |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Net Interest Income of Acquiree since Acquisition Date, Actual |  |  |  |  | 23,400 |  |  |  |  |
Business Combination, Pro Forma Information, Income Before Income Taxes since Acquisition Date, Actual |  |  |  |  | $ 8,100 |  |  |  |  |
Goodwill | $ 20,264 | 20,264 |  |  |  |  |  |  |  |
Proceeds from sales of investment securities available for sale |  | $ 98,000 |  |  |  |  |  |  |  |
Debt Securities, Available-for-Sale, Weighted Average Yield | 5.03% | 5.03% |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Gross | $ (25,343) |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Income | 635 |  |  |  |  |  |  |  |  |
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  | $ 6,900 |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Equipment | (362) |  |  |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived | 18,854 | $ 18,854 |  |  |  |  |  | $ 0 |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets | 1,398 |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits | (215) |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Allowance For Unfunded Commitments | 852 |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other | (41) |  |  |  |  |  |  |  |  |
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life |  | 10 years |  |  |  |  |  |  |  |
Traditions Bancorp, Inc. | Financial Asset Acquired with Credit Deterioration |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Gross | 4,400 |  |  |  |  |  |  |  |  |
Traditions Bancorp, Inc. | PCD Accruing |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  | $ 1,500 |  |  |  |  |  |  |  |
Traditions Bancorp, Inc. | Non-PCD |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Gross | $ 21,600 |  |  |  |  |  |  |  |  |
Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date |  | $ 5,500 |  |  |  |  |  |  |  |

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