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Schedule II - Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Allowance for losses on accounts receivable (deducted from the asset to which it relates)      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 980 $ 2,368 $ 879
Additions charged to costs and expenses 380 566 1,492
Additions charged to other accounts 0 0 0
Deductions (475) (1,954) (3)
Balance at end of period 885 980 2,368
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 61,668 41,002 58,343
Additions charged to costs and expenses 1,107 20,678 1,121
Additions charged to other accounts 0 0 0
Deductions (34,406) (12) (18,462)
Balance at end of period $ 28,369 $ 61,668 $ 41,002