Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Shareholders' Equity Consolidated Statements of Shareholders' Equity (Parenthetical)

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Consolidated Statements of Shareholders' Equity Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash dividends per share $ 0.91 $ 0.88 $ 0.86