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Earnings Per Share
3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
Note 9: Earnings Per Share
Unless otherwise noted in the footnotes, all per-share amounts are presented on a diluted basis, that is, based on the weighted-average number of outstanding common shares plus the effect of all potentially dilutive common shares (primarily contingently issuable shares and unexercised stock options).