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Earnings Per Share (Narrative) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2015
Aug. 31, 2014
Earnings Per Share [Abstract]        
Number of shares excluded from the calculation of diluted earnings per share 1,173 351 296 383