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Income Taxes - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Sep. 29, 2018
Dec. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Income tax expense     $ 94,570 $ 9,761 $ 10,967
Tax Reform Income Tax Expense (Benefit) $ (38,600) $ 124,500 85,900    
Tax Cuts and Jobs Act of 2017, Tax on Deemed Repatriation of Foreign Earnings     61,200    
Deferred Tax Liabilities, Undistributed Foreign Earnings 21,800   21,800    
Other Tax Expense (Benefit) 1,100   (2,900)    
Additions (reductions) to valuation allowance 3,600   (32,900) 14,900  
Foreign earnings repatriated         100,000
Increase (Decrease) to valuation allowance     (33,300)    
Uncertain tax benefits 5,800   5,800    
Unrecognized tax benefits that would reduce company's effective tax rate if recognized 4,600   4,600 800  
Total accrued penalties and net accrued interest with respect to income taxes 200   200 200 200
Expense recognized for accrued penalties and net accrued interest (less than)     100 100 100
Other liabilities (noncurrent)          
Uncertain tax benefits 4,600   4,600    
Deferred income taxes (noncurrent asset)          
Uncertain tax benefits 1,200   1,200    
Foreign Tax Authority          
Net operating loss carryforwards 80,500   80,500    
State Jurisdiction          
Net operating loss carryforwards $ 174,700   174,700    
AMER          
Increase (Decrease) to valuation allowance     (34,400)    
EMEA          
Additions (reductions) to valuation allowance     1,400    
Increase (Decrease) to valuation allowance     1,100    
APAC          
Tax reductions related to tax holiday     $ 39,100 $ 37,500 $ 27,100
Tax reductions related to tax holiday, basic (in dollars per share)     $ 1.19 $ 1.11 $ 0.81
Tax reductions related to tax holiday, diluted (in dollars per share)     $ 1.15 $ 1.08 $ 0.79
Tax Cuts and Jobs Act of 2017 [Member]          
Additions (reductions) to valuation allowance     $ (9,700)    
Valuation Allowance, Operating Loss Carryforwards [Member]          
Additions (reductions) to valuation allowance     (21,000)    
Global intangible low-taxed income [Member]          
Additions (reductions) to valuation allowance     $ (3,600)