Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Common stock, par value (in usd per share) $ 1.33 $ 1.33
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 65,939,375 43,743,318
Common stock, shares outstanding (in shares) 65,939,375 43,743,318