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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Preferred stock, par value $ 0.5 $ 0.5
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Common Stock [Member]    
Common stock, par value $ 0.5 $ 0.5
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares outstanding 38,705,586 38,108,752
Treasury stock, shares 4,778,988 4,823,988
Class B Common Stock [Member]    
Common stock, par value $ 0.5 $ 0.5
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares outstanding 5,562,945 5,513,386
Treasury stock, shares 48,263 48,263