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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2021
Dec. 31, 2020
Preferred stock, par value $ 0.50 $ 0.50
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Common Stock    
Common stock, par value $ 0.50 $ 0.50
Common stock, shares authorized 60,000,000 60,000,000
Common stock, shares outstanding 37,881,247 37,702,489
Treasury stock, shares 4,823,988 4,823,988
Class B Common Stock    
Common stock, par value $ 0.50 $ 0.50
Common stock, shares authorized 10,000,000 10,000,000
Common stock, shares outstanding 5,790,636 5,691,456
Treasury stock, shares 48,263 48,263