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Dividends Payable	9 Months Ended
Dividends Payable	Jan. 31, 2015
Dividends [Abstract]
Dividends Payable	Dividends Payable On January 20, 2015, our Board of Directors declared a regular quarterly cash dividend of $0.315 per share on our Class A and Class B common stock. Stockholders of record on March 10, 2015 will receive the cash dividend on April 1, 2015.