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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]    
Cash dividends (in dollars per share) $ 0.14 $ 0.12
Common stock (purchased) sold by directors' deferred compensation plan (in net shares) 5,000 12,559
Shares of common stock repurchased 233,722 473,829