Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jul. 31, 2015	Oct. 31, 2014
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative contracts not designated as hedging instruments, Assets	$ 1,213	$ 1,081
Embedded derivatives, Assets	4,454	2,351
Derivative contracts not designated as hedging instruments, Liabilities	1,837	4,188
Embedded derivatives, Liabilities	132	15
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent purchase obligation	3,750	5,000
Designated as Hedging Instrument | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative contracts designated as hedging instruments, Assets	892	24
Derivative contracts designated as hedging instruments, Liabilities	$ 28,277	$ 14,592