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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2018
Dec. 31, 2017
EQUITY    
Common shares, shares issued (in shares) 101,302,404 101,118,289
Common shares, shares outstanding (in shares) 101,302,404 101,118,289
Common shares, par value (in dollars per share) $ 1.00 $ 1.00