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Derivative Instruments (Derivative Instruments Outstanding) (Details) - Interest Rate Swaps [Member] - Derivatives Designated As Hedging Instrument [Member] - USD ($)
$ in Thousands
Sep. 30, 2018
Oct. 01, 2017
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value $ (703) $ (22,927)
Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value (26) (4,777)
Other Noncurrent Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value (1,266) (18,150)
Other Noncurrent Assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Noncurrent $ 589 $ 0