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Derivative Financial Instruments (Offsetting Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Gross Amount of Recognized Liabilities $ 4,333  
Gross Amounts Offset in the Consolidated Balance Sheets 0  
Net Amounts of Liabilities Presented in the Consolidated Balance Sheets 4,333 $ 4,347
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments (2,694)  
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Pledged 0  
Net Amount $ 1,639