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Portfolio Loans - Narrative (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
contract
Dec. 31, 2022
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Net deferred loan origination (fees) costs $ 13,400,000   $ 13,400,000   $ 14,000,000
Net accretable purchase accounting adjustments     (5,100,000)   (5,900,000)
Gross interest income that would have been recorded if impaired loans had been current 300,000 $ 300,000 700,000 $ 500,000  
Amount of interest collected and recognized on a cash basis       $ 400,000  
TDRs subsequently classified as non-performing and had payment defaults | contract   0   0  
Collateral dependent loans secured by real estate or business assets     13,600,000   14,000,000
Loans in the process of foreclosure 1,100,000   1,100,000    
Performing Financial Instruments          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Troubled debt restructuring         3,000,000
Nonperforming Financial Instruments          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Troubled debt restructuring         500,000
Retail real estate          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans purchased 0 $ 0 0 $ 0  
Commercial          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans designated as TDRs | contract   1   1  
Maximum | Commercial real estate          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Limit where loans are processed through an expedited underwriting process     1,000,000    
Watch | Total commercial loans          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Limit above which loans are annually reviewed     1,000,000    
Special Mention | Total commercial loans          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Limit above which loans are annually reviewed     350,000    
PPP Loans          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Amortized cost of the loans outstanding $ 700,000   $ 700,000   $ 800,000