Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Oct. 02, 2015
Income Tax Disclosure [Abstract]
Reserves and liabilities	$ 53,119	$ 48,918
Loss carryforwards	51,760	49,667
Tax credit carryforwards	34,836	32,015
Employee benefits	13,853	12,316
Retirement benefits	22,703	17,055
Non-qualified stock options	13,571	11,908
Hedging activities	3,350	6,092
Other	1,003	2,187
Total deferred tax assets	194,195	180,158
Less valuation allowance	(42,976)	(42,694)
Total deferred tax assets, net of valuation allowance	151,219	137,464
Depreciation and amortization	(7,456)	(9,352)
Intangibles and amortization	(116,620)	(124,941)
Deferred costs	(3,907)	(5,779)
Other	(1,625)	(1,180)
Total deferred tax liabilities	(129,608)	(141,252)
Net deferred tax asset	$ 21,611
Net deferred tax (liability)		$ (3,788)