Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Statement Of Stockholders Equity [Abstract]
Deferred tax benefit, Foreign currency translation adjustments			$ 3,250
Deferred tax benefit (expense), Pension liability	$ 13,303	$ (438)	(14,562)
Deferred tax expense (benefit) , Other comprehensive income (loss), Gain on derivatives	(274)	766	513
Deferred tax expense (benefit), Issuances equity securities	$ 3,382	$ 10,332	$ 1,264