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Derivative Financial Instruments (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Sep. 30, 2016
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments $ 700 $ 300 $ 3,200 $ 1,300  
Forward Contracts | Other Current Liabilities [Member]          
Foreign currency cash flow hedge asset at fair value 4,394   4,394    
Forward Contracts | Other Current Assets [Member]          
Foreign currency cash flow hedge asset at fair value 4,802   4,802    
Forward Contracts | Other Assets [Member]          
Foreign currency cash flow hedge asset at fair value 0   0    
Forward Contracts | Other Noncurrent Liabilities [Member]          
Foreign currency cash flow hedge asset at fair value $ 131   131    
Forward Contracts | Not Designated as Hedging Instrument [Member]          
Derivative, Remaining Maturity 3 months        
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value $ 4,576   4,576    
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value $ 2,215   2,215    
Forward Contracts | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]          
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value         $ 1,693
Forward Contracts | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]          
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value         216
Forward Contracts | Designated as Hedging Instrument [Member]          
Derivative, Remaining Maturity 15 months        
Foreign currency cash flow hedge asset at fair value $ 226   226    
Foreign Currency Cash Flow Hedge Liability at Fair Value $ 2,310   $ 2,310    
Forward Contracts | Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]          
Foreign Currency Cash Flow Hedge Liability at Fair Value         1,477
Forward Contracts | Designated as Hedging Instrument [Member] | Other Current Assets [Member]          
Foreign currency cash flow hedge asset at fair value         $ 44