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Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Treasury stock, shares 6,978,400 6,714,338
Nonvoting Common Stock    
Common stock, par value per share (in Dollars per share) $ 1 $ 1
Common stock, shares authorized 50,000 50,000
Common stock, shares issued
Common Stock    
Common stock, par value per share (in Dollars per share) $ 1 $ 1
Common stock, shares authorized 40,000,000 40,000,000
Common stock, shares issued 24,437,020 24,378,568
Common stock, shares outstanding 17,458,620 17,664,230