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Changes In Restructuring Liability (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2013 | Apr. 30, 2014 | Apr. 30, 2013 | Apr. 30, 2012
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Liability, Beginning period |  | $ 11,548 | $ 2,770 |  |
Restructuring charges, net | 2,900 | 3,682 | 22,857 | [1] | 929
Reductions for cash payments |  | (12,705) | (13,998) |  |
Exchange rate fluctuations |  | 288 | (81) |  |
Liability, Ending period | 11,548 | 2,813 | 11,548 |  | 2,770
Severance |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Liability, Beginning period |  | 4,819 | 38 |  |
Restructuring charges, net |  | 823 | 16,369 | [1] |
Reductions for cash payments |  | (5,884) | (11,561) |  |
Exchange rate fluctuations |  | 242 | (27) |  |
Liability, Ending period | 4,819 |  | 4,819 |  |
Facilities |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Liability, Beginning period |  | 6,729 | 2,732 |  |
Restructuring charges, net |  | 2,859 | 6,488 | [1] |
Reductions for cash payments |  | (6,821) | (2,437) |  |
Exchange rate fluctuations |  | 46 | (54) |  |
Liability, Ending period | $ 6,729 | $ 2,813 | $ 6,729 |  |
[1] | During fiscal 2013, the Company recovered $1.0 million from a legal settlement (related to premises) attributable to a previous restructuring action.

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