Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 10,501	$ 33,151
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss) adjustments	(1,503)	2,499
Derivative instruments
Unrealized net gain (loss)	(1,416)	1,030
Net (gain) loss reclassified to earnings	(914)	103
Defined benefit pension plan
Unrealized net gain (loss)	(1,545)	370
Net (gain) loss reclassified to earnings	96	91
Currency exchange rate gain (loss)	115	(87)
Other comprehensive income (loss)	(5,167)	4,006
Comprehensive income (loss)	$ 5,334	$ 37,157