Annual report pursuant to Section 13 and 15(d)

Changes In Restructuring Liability (Detail)

v3.7.0.1
Changes In Restructuring Liability (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2015
Restructuring Cost and Reserve [Line Items]      
Liability, Beginning period $ 5,962 $ 1,146  
Restructuring charges, net 34,600 33,013 $ 9,468
Reductions for cash payments (23,677) (26,459)  
Non-cash items (2,024) (1,843)  
Exchange rate fluctuations (1,166) 105  
Liability, Ending period 13,695 5,962 1,146
Severance      
Restructuring Cost and Reserve [Line Items]      
Liability, Beginning period 5,293 375  
Restructuring charges, net 15,963 32,151 9,200
Reductions for cash payments (14,974) (25,625)  
Non-cash items   (1,752)  
Exchange rate fluctuations (941) 144  
Liability, Ending period 5,341 5,293 375
Facilities      
Restructuring Cost and Reserve [Line Items]      
Liability, Beginning period 669 771  
Restructuring charges, net 18,637 862 300
Reductions for cash payments (8,703) (834)  
Non-cash items (2,024) (91)  
Exchange rate fluctuations (225) (39)  
Liability, Ending period $ 8,354 $ 669 $ 771