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Subsequent Event	9 Months Ended
Subsequent Event	Jan. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On February 13, 2019, our Board of Directors declared a quarterly cash dividend of $0.11 per share of our Class A and Class B common stock. The cash dividend is payable on May 24, 2019 to Class A and Class B shareholders of record at the close of business on May 10, 2019.