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Dividend Restrictions (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dividend Restrictions [Abstract]      
Minimum percentage of capital stock surplus under dividend restriction 50.00%    
Cash dividends paid to parent company $ 20,580,000 $ 22,338,000 $ 15,885,000