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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income/(loss)	$ 1,287	$ 60,256	$ 5,249	$ 27,041
Other comprehensive (loss)/income:
Foreign currency translation adjustment	(42)	(8,409)	(1,430)	(817)
Unrecognized actuarial gain/(loss) on pension plan, net of tax	(31)	61	(9)	36
Foreign currency translation and pension plan, net of tax	(73)	(8,348)	(1,439)	(781)
Derivatives designated as hedging instruments:
Unrealized gain on derivative instruments, net of tax	(49)	(1,542)	39	(513)
Reclassification adjustment for loss/(gain) on derivative instruments recognized, net of tax	33	(344)	1,165	(1,884)
Net decrease/(increase) from derivatives designated as hedging instruments, net of tax	(16)	(1,886)	1,204	(2,397)
Total other comprehensive income/(loss)	(89)	(10,234)	(235)	(3,178)
Comprehensive (loss)/income	$ 1,198	$ 50,022	$ 5,014	$ 23,863

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