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Fair Value - Quantitative information about recurring and non-recurring Level 3 fair value measurements (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
state and municipal obligations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 1,895
state and municipal obligations | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 1,545  
state and municipal obligations | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 3.73 3.41
state and municipal obligations | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 4.44 4.44
Impaired Loans | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 0.00  
Impaired Loans | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 50.00  
Collateralized debt obligations    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 3,359
Collateralized debt obligations | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 2.67 1.83
Collateralized debt obligations | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 3,111  
Other securities    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 1,743
Other securities | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 2,478  
Other securities | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 0.04 0.65
Other securities | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent) 3.35 1.40
Collateral dependent loans    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value   $ 12,839
Collateral dependent loans | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,172  
Collateral dependent loans | Minimum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent)   0.00
Collateral dependent loans | Maximum | Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Range of Inputs (percent)   50.00