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Dividends Payable	3 Months Ended
Dividends Payable	Jul. 31, 2013
Dividends [Abstract]
Dividends Payable	Dividends Payable On July 25, 2013, our Board of Directors declared a regular quarterly cash dividend of $0.255 per share on our Class A and Class B common stock. Stockholders of record on September 5, 2013 will receive the cash dividend on October 1, 2013.