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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]    
Cash dividends declared (in dollars per share) $ 0.19 $ 0.18
Treasury stock purchased (in shares) 23,288 4,699