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Consolidated Balance Sheets (Parenthetical) (USD $)
Dec. 31, 2013
Dec. 31, 2012
EQUITY    
Common shares, shares issued (in shares) 80,579,295 80,503,364
Common shares, shares outstanding (in shares) 80,579,295 80,503,364
Common shares, par value (in dollars per share) $ 1.00 $ 1.00