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Composition of loans receivable by risk rating grade (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial $ 232,033 $ 239,997
Commercial real estate 515,266 491,659
Residential real estate 457,506 449,652
Consumer 44,961 46,208
Loans receivable, gross $ 1,249,766 1,227,516
Pass [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial   232,259
Commercial real estate   477,006
Residential real estate   444,778
Consumer   46,041
Loans receivable, gross   1,200,084
Special Mention [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial   6,195
Commercial real estate   8,798
Residential real estate   2,995
Consumer   162
Loans receivable, gross   18,150
Substandard [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial   1,543
Commercial real estate   5,855
Residential real estate   1,879
Consumer   5
Loans receivable, gross   9,282
Doubtful [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial  
Commercial real estate  
Residential real estate  
Consumer  
Loans receivable, gross  
Unlikely to be Collected Financing Receivable [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial  
Commercial real estate  
Residential real estate  
Consumer  
Loans receivable, gross  
Nonperforming Financial Instruments [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Commercial & industrial   239,997
Commercial real estate   491,659
Residential real estate   449,652
Consumer   46,208
Loans receivable, gross   $ 1,227,516