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Changes In Restructuring Liability (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2016 | Oct. 31, 2016
Restructuring Cost and Reserve [Line Items] |  |
Liability, Beginning period | $ 21,250 | $ 5,962
Restructuring charges, net |  | 24,520
Reductions for cash payments | (8,400) | (14,975)
Reductions for non-cash charges |  | (2,480)
Exchange rate fluctuations | (919) | (1,096)
Liability, Ending period | 11,931 | 11,931
Severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Liability, Beginning period | 11,866 | 5,293
Restructuring charges, net |  | 11,472
Reductions for cash payments | (6,217) | (11,005)
Exchange rate fluctuations | (644) | (755)
Liability, Ending period | 5,005 | 5,005
Facilities |  |
Restructuring Cost and Reserve [Line Items] |  |
Liability, Beginning period | 9,384 | 669
Restructuring charges, net |  | 13,048
Reductions for cash payments | (2,183) | (3,970)
Reductions for non-cash charges |  | (2,480)
Exchange rate fluctuations | (275) | (341)
Liability, Ending period | $ 6,926 | $ 6,926

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