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CONSOLIDATED STATEMENTS OF CHANGES IN COMMON STOCK EQUITY (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Dividends per Common Share | $ 1.42 | $ 1.40 | $ 1.38
Common stock, shares issued | 32,095 | 36,265 | 38,020

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