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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY    
Cash dividends (in dollars per share) $ 0.24 $ 0.16
Common stock (purchased) sold by directors' deferred compensation plan (in net shares) 8,159 1,118
Shares of common stock repurchased 3,950,781 6,369,266