Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 43,067	$ 61,328	$ 25,084
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss) adjustments	(9,980)	(2,174)	3,273
Derivative instruments
Unrealized net gain (loss)	(2,141)
Unrealized net gain (loss)		4,325	2,110
Net (gain) loss reclassified to earnings	(2,905)
Net (gain) loss reclassified to earnings		(598)	98
Defined benefit pension plan
Unrealized net gain (loss)	(5,758)	(621)	4,132
Net (gain) loss reclassified to earnings	379	367	696
Currency exchange rate gain (loss)	456	90	(489)
Other comprehensive income (loss)	(19,949)	1,389	9,820
Comprehensive income	$ 23,118	$ 62,717	$ 34,904