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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY    
Cash dividends (in dollars per share) $ 0.16  
Common stock purchased (sold) by directors' deferred compensation plan (in shares) 1,118 1,782
Shares of common stock repurchased 6,369,266