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Acquisitions and Intangible Assets - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 11, 2020
Dec. 31, 2024
USD ($)
acquistion
Dec. 31, 2023
USD ($)
acquistion
Dec. 31, 2022
USD ($)
Business Acquisition [Line Items]        
Number of acquisitions | acquistion   0 0  
Amortization of identified intangibles   $ 26 $ 26 $ 69
Belfast, Maine Branch | Core Deposits        
Business Acquisition [Line Items]        
Intangible assets useful life 10 years      
Amortization of identified intangibles   26 $ 26  
Yearly amortization expense until fully amortized   $ 26