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Derivative Financial Instruments (Offsetting Assets) (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Gross Amount of Recognized Assets $ 2,694  
Gross Amounts Offset in the Consolidated Balance Sheets 0  
Net Amounts of Assets Presented in the Consolidated Balance Sheets 2,694 $ 1,163
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments (2,694)  
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received 0  
Net Amount $ 0