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Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
May 31, 2017
Feb. 28, 2017
May 31, 2017
Goodwill And Other Intangible Assets [Abstract]      
Impairment of goodwill $ 0 $ 0 $ 0