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Subsequent Events	9 Months Ended
Subsequent Events	Apr. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE J — Subsequent Events On May 24, 2017, the Board of Directors declared a quarterly cash dividend to shareholders of the Company’s Class A and Class B Common Stock of $0.205 per share payable on July 31, 2017, to shareholders of record at the close of business on July 10, 2017.