Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Apr. 01, 2016	Oct. 02, 2015
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative contracts designated as hedging instruments, Assets	$ 5,328	$ 1,386
Derivative contracts not designated as hedging instruments, Assets	560	189
Embedded derivatives, Assets	2,406	3,992
Derivative contracts designated as hedging instruments, Liabilities	12,505	24,660
Derivative contracts not designated as hedging instruments, Liabilities	4,783	2,324
Embedded derivatives, Liabilities	1,537	380
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Contingent purchase obligation	$ 0	$ 3,750