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, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]        
Cash dividends, per share $ 0.33 $ 0.29 $ 0.66 $ 0.58