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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value $ 10 $ 10
Common stock, shares authorized 2,810,000 2,810,000
Common stock, shares outstanding 1,994,177 1,994,177
Treasury stock, shares 815,823 815,823