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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Assets      
Securities to be held to maturity, allowance for credit loss $ 432,000 [1] $ 0 $ 0
Securities to be held to maturity, fair value $ 311,864,000 $ 339,011,000 $ 313,796,000
Shareholders' equity      
Common stock par value (usd per share) $ 0.01 $ 0.01 $ 0.01
[1] December 31, 2022 and September 30, 2022 had no allowance for credit losses