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Derivative Instruments (Derivative Instruments Outstanding) (Details) - Interest rate swaps - Derivatives designated as hedging instruments - USD ($)
$ in Thousands
Sep. 29, 2019
Sep. 30, 2018
Derivatives, Fair Value [Line Items]    
Total liabilities at fair value $ 0 $ (703)
Accrued liabilities    
Derivatives, Fair Value [Line Items]    
Total liabilities at fair value 0 (26)
Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Total liabilities at fair value 0 (1,266)
Other assets, net    
Derivatives, Fair Value [Line Items]    
Total assets at fair value $ 0 $ 589