Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		$ 23,128
End of period		27,381	$ 23,128
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		621	143	$ 504
Charged to Costs and Expenses		(115)	478	(320)
Other Additions		0	0	0
Other Deductions	[1]	0	0	(41)
End of period		506	621	143
Inventory reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		19,073	13,863	14,120
Charged to Costs and Expenses		6,676	3,978	3,060
Other Additions		0	7,696	0
Other Deductions	[2]	(4,669)	(6,464)	(3,317)
End of period		21,080	19,073	13,863
Valuation allowance for deferred taxes [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		27,258	24,624	26,444
Charged to Costs and Expenses	[3]	3,585	2,634	(1,820)
Other Additions		0	0	0
Other Deductions		0	0	0
End of period		$ 30,843	$ 27,258	$ 24,624

[1] Represents write-offs of specific accounts receivable.

[2] Sale or scrap of previously reserved inventory.

[3] Reflects increase/decrease in the valuation allowance primarily associated with the Company's U.S. and foreign net operating losses and other deferred tax assets.