CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 11,151	$ 1,287	$ 36,516	$ 5,249
Other comprehensive income/(loss):
Foreign currency translation adjustment	745	(42)	2,424	(1,430)
Unrecognized actuarial loss on pension plan, net of tax	(5)	(31)	(71)	(9)
Foreign currency translation and pension plan, net of tax	740	(73)	2,353	(1,439)
Derivatives designated as hedging instruments:
Unrealized gain/(loss) on derivative instruments, net of tax	1,034	(49)	(340)	39
Reclassification adjustment for gain on derivative instruments recognized, net of tax	384	33	653	1,165
Net increase/(decrease) from derivatives designated as hedging instruments, net of tax	1,418	(16)	313	1,204
Total other comprehensive gain/(loss)	2,158	(89)	2,666	(235)
Comprehensive income	$ 13,309	$ 1,198	$ 39,182	$ 5,014