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Summary of Significant Accounting Policies - Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jan. 01, 2023
Dec. 31, 2022
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses $ 4,112   $ 2,052
ASU No. 2016-13      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses   $ 2,052  
ASU No. 2016-13 | Commercial and Industrial      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses   215  
ASU No. 2016-13 | Commercial Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses   815  
ASU No. 2016-13 | Residential Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses   816  
ASU No. 2016-13 | Consumer      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Less allowance for credit losses   206  
ASU No. 2016-13 | Adoption Impact      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   2,419  
ASU No. 2016-13 | Adoption Impact | Commercial and Industrial      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   755  
ASU No. 2016-13 | Adoption Impact | Commercial Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   388  
ASU No. 2016-13 | Adoption Impact | Residential Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   1,379  
ASU No. 2016-13 | Adoption Impact | Consumer      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   (103)  
ASU No. 2016-13 | As Reported      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   4,471  
ASU No. 2016-13 | As Reported | Commercial and Industrial      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   970  
ASU No. 2016-13 | As Reported | Commercial Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   1,203  
ASU No. 2016-13 | As Reported | Residential Real Estate      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   2,195  
ASU No. 2016-13 | As Reported | Consumer      
Impact of adoption of ASU 2016-13 on allowance for credit Losses on loans      
Loans, allowance for credit losses   $ 103