Quarterly report pursuant to Section 13 or 15(d)

Components of Accumulated Other Comprehensive Loss (Detail)

v3.3.1.900
Components of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
Oct. 31, 2015
Jul. 31, 2015
Apr. 30, 2015
Oct. 31, 2014
Jul. 31, 2014
Apr. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Foreign currency translation adjustments $ (37,902)   $ (20,919)      
Deferred compensation and pension plan adjustments, net of tax (18,813)   (19,708)      
Unrealized gains on marketable securities, net of tax     4      
Accumulated other comprehensive loss, net $ (56,715) $ (55,812) $ (40,623) $ (17,671) $ (5,587) $ (2,388)