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Investment Securities - Amortized Cost and Fair Value, Realized Gains and Losses (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Investment Securities    
Debt securities available for sale, amortized cost $ 359,793 $ 370,489
Debt securities available for sale, Gross Unrealized Gain 92 21
Debt securities available for sale, Gross Unrealized Loss (25,377) (26,952)
Debt securities available for sale, at fair value 334,508 343,558
Accrued interest receivable on available for sale debt securities 861 808
Carrying value of debt securities held of any single issuer in excess of 10% of shareholders equity $ 0 $ 0
Threshold percentage of total shareholders' equity above which securities of any single issuer exceed 10.00% 10.00%
Proceeds from the sale of debt securities $ 2,977  
Gross realized gains 1  
Gross realized losses (3)  
Total net realized losses (2)  
Income tax expense on net realized losses 1  
Collateralized mortgage obligations | US Government Corporations and Agencies Securities    
Investment Securities    
Debt securities available for sale, at fair value 338 $ 353
Debt securities | Assets pledged as collateral | FHLB borrowings    
Investment Securities    
Debt securities available for sale, at fair value 107,515  
Debt securities | Assets pledged as collateral | FRB    
Investment Securities    
Debt securities available for sale, at fair value 62,557  
U.S. Treasury and Agency securities    
Investment Securities    
Debt securities available for sale, amortized cost 176,768 175,878
Debt securities available for sale, Gross Unrealized Gain 13 17
Debt securities available for sale, Gross Unrealized Loss (6,709) (7,458)
Debt securities available for sale, at fair value 170,072 168,437
Mortgage-backed securities    
Investment Securities    
Debt securities available for sale, amortized cost 38,883 41,388
Debt securities available for sale, Gross Unrealized Loss (4,373) (4,655)
Debt securities available for sale, at fair value 34,510 36,733
Collateralized mortgage obligations    
Investment Securities    
Debt securities available for sale, amortized cost 143,987 153,066
Debt securities available for sale, Gross Unrealized Gain 79 4
Debt securities available for sale, Gross Unrealized Loss (14,284) (14,829)
Debt securities available for sale, at fair value 129,782 138,241
Collateralized debt obligations    
Investment Securities    
Debt securities available for sale, amortized cost 155 157
Debt securities available for sale, Gross Unrealized Loss (11) (10)
Debt securities available for sale, at fair value $ 144 $ 147