Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 33,151	$ 1,705
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss) adjustments	2,499	(9,802)
Derivative instruments
Unrealized net gain (loss)	1,030	4,158
Net (gain) loss reclassified to earnings	103	(268)
Defined benefit pension plan
Unrealized net gain (loss)	370	128
Net (gain) loss reclassified to earnings	91	170
Currency exchange rate gain (loss)	(87)	697
Other comprehensive income (loss)	4,006	(4,917)
Comprehensive income (loss)	$ 37,157	$ (3,212)