Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended
	Jul. 31, 2013		Jul. 31, 2012
Diluted	$ 0.06	[1]	$ 0.09	[1]
Class B Common Shares
Diluted	$ 0.06		$ 0.09	[2]

[1] Basic per share amounts are the same for Class A and Class B shares. Diluted per share amounts for Class A shares are shown above. Diluted earnings per share for Class B shares under the two-class method are $0.06 and $0.09 for the three months ended July 31, 2013 and 2012, respectively. See Note D to the Condensed Consolidated Financial Statements.

[2] Amounts adjusted for rounding