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Acquisitions, Evans Bancorp, Inc. (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 02, 2025 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) Location
Acquisition of Evans Bancorp, Inc [Abstract] |  |  |  |
Acquisition expenses |  | $ 1,221 | $ 0 |
Evans Bancorp, Inc [Member] |  |  |  |
Acquisition of Evans Bancorp, Inc [Abstract] |  |  |  |
Assets of the acquiree |  |  |  | $ 2,190,000
Number of banking locations operated by acquiree | Location |  |  |  | 18
Acquisition expenses |  | $ 1,200 |  |
Evans Bancorp, Inc [Member] | Subsequent Event [Member] |  |  |  |
Acquisition of Evans Bancorp, Inc [Abstract] |  |  |  |
Total consideration | $ 222,000 |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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