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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
shares in Thousands
Sep. 30, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 1.25 $ 1.25
Common stock, shares authorized 6,000 6,000
Common stock, shares issued 3,542 3,542
Common stock, shares outstanding 3,542 3,542