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Business Combination - Schedule of Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands | Feb. 01, 2025 | Feb. 01, 2025 | Sep. 30, 2025 | Jan. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023
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Business Combination [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | $ 64,449 |  | $ 44,185 | $ 44,185 | $ 44,185
Traditions Bancorp, Inc. |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interest |  | $ 83,649 |  |  |  |  |
Payments to Acquire Businesses, Gross |  | 157 |  |  |  |  |
Business Combination, Consideration Transferred |  | 83,806 |  |  |  |  |
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent | $ 36,363 | 36,363 |  | $ 36,363 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investment Securities | 97,666 | 97,666 |  | 98,484 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Investment Securities | (818) |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loan Held-for-Sale | 12,512 | 12,512 |  | 12,512 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Gross | 648,462 | 648,462 |  | 673,805 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Gross | (25,343) |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Allowance for Credit Losses | (1,464) | (1,464) |  | (4,045) |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Allowance for Credit Losses | 2,581 |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans, Net | 646,998 | 646,998 |  | 669,760 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Loans, Net | (22,762) |  |  |  |  |  |
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Equipment | 6,873 | 6,873 |  | 7,235 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Equipment | (362) |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Right of Use Asset | 2,932 | 2,932 |  | 2,932 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Investment in Bank Stocks | 3,323 | 3,323 |  | 3,323 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investment in Bank-Owned Life Insurance | 16,384 | 16,384 |  | 16,384 |  |  |
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived | 18,854 | 18,854 |  | 0 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles | 18,854 |  |  |  |  |  |
Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent | 15,545 | 15,545 |  | 14,147 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Noncurrent Assets | 1,398 |  |  |  |  |  |
Business Combination, Recognized Asset Acquired, Asset | 857,450 | 857,450 |  | 861,140 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets | (3,690) |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits | 741,508 | 741,508 |  | 741,723 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deposits | (215) |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Borrowings | 40,188 | 40,188 |  | 40,000 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Borrowings | 188 |  |  |  |  |  |
Business Combination, Recognized Liability Assumed, Lease Obligation | 3,125 | 3,125 |  | 3,125 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Allowance for Unfunded Commitments | 970 | 970 |  | 118 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Allowance For Unfunded Commitments | 852 |  |  |  |  |  |
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent | 8,117 | 8,117 |  | 8,158 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Other | (41) |  |  |  |  |  |
Business Combination, Recognized Liability Assumed, Liability | 793,908 | 793,908 |  | 793,124 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities | 784 |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | 63,542 | 63,542 |  | $ 68,016 |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred | (4,474) |  |  |  |  |  |
Goodwill | $ 20,264 | $ 20,264 |  |  |  |  |

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