Note 6 Debt Detail (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	12 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Dec. 27, 2014	Apr. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014	Oct. 01, 2011
Loss on extinguishments of debt					$ 0	$ 0	$ 3,760
Discounted value of notes issued				$ 30,100	$ 0	$ 30,105	$ 0
Debt due 2017
Extinguishment of Debt, Amount	$ 40,000
Secured Notes due 2019
Face value of debt								$ 375,000
Maturity Date					Jun. 01, 2019
Interest rate					4.375%
Frequency of Periodic Payment					semi-annually in arrears
Debt Instrument, Call Feature					All or any portion of the Secured Notes may be redeemed, at any time, at the option of the Company, at a redemption price equal to 100% of the principal amount of the Secured Notes redeemed plus accrued and unpaid interest, plus a make-whole premium. Following a change of control, as defined, the Company would be required to make an offer to repurchase all of the Secured Notes at a purchase price of 101% of the principal amount of the Secured Notes to be repurchased, plus accrued and unpaid interest to, but excluding, the date of repurchase.
Debt due 2019
Face value of debt									$ 500,000
Extinguishment of Debt, Amount			$ 100,000
Loss on extinguishments of debt			2,900
Write-off of Unamortized Debt Issuance Cost			1,400
Carrying value adjustment derecognized upon debt extinguishment			3,800
Manufacturing Facility [Member]
Face value of debt		$ 15,000		$ 15,000
Effective Date of Acquisition		Feb. 01, 2016
Discounted value of notes issued		$ 12,300
Promissory Note Description					four-year non-interest bearing promissory note
Redemption premium | Debt due 2019
Payment for Debt Extinguishment or Debt Prepayment Cost			$ 5,300