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Subsequent Events	3 Months Ended
Subsequent Events	Oct. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On November 18, 2015, the Board of Directors declared a quarterly cash dividend to shareholders of the Company’s Class A and Class B Common Stock of $0.2025 per share payable on January 29, 2016, to shareholders of record at the close of business on January 8, 2016. On November 18, 2015, the Company's Board of Directors authorized an increase in the Company’s share repurchase program, authorizing the repurchase of an additional 807,692 shares, for a total of up to two million shares of the Company’s Class A Common Stock available for repurchase as of that date. The plan may be implemented by purchasing shares in the open market or in privately negotiated transactions, with repurchased shares available for use in connection with the Company's stock-based plans and for other corporate purposes.