Annual report pursuant to Section 13 and 15(d)

Goodwill And Intangible Assets (Changes In Carrying Value Of Goodwill By Reportable Segment) (Parenthetical) (Detail)

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Goodwill And Intangible Assets (Changes In Carrying Value Of Goodwill By Reportable Segment) (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Apr. 30, 2012
Goodwill [Line Items]  
Reduction in goodwill due to deconsolidate of subsidiary $ 586 [1]
[1] During fiscal 2012, the Company sold a majority interest in a previously consolidated subsidiary, requiring the Company to deconsolidate the subsidiary and reduce goodwill by $0.6 million