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Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Preferred stock, par value (in dollars per share) $ 1 $ 1
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Treasury stock, shares (in shares) 410 410