Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY AND OTHER COMPREHENSIVE INCOME (Parenthetical)

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CONSOLIDATED STATEMENT OF CHANGES IN EQUITY AND OTHER COMPREHENSIVE INCOME (Parenthetical) - $ / shares
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statement of Stockholders' Equity [Abstract]        
Cash dividends, per share (in dollars per share) $ 0.39 $ 0.33 $ 0.78 $ 0.66