Annual report pursuant to Section 13 and 15(d)

Quarterly Results (Parenthetical) (Detail)

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Quarterly Results (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Apr. 30, 2013
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2011
Restructuring charges, net $ 2,900 $ 22,857 [1] $ 929 $ 2,130
[1] During fiscal 2013, the Company recovered $1.0 million from a legal settlement (related to premises) attributable to a previous restructuring action.