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Stock-Based Compensation (Stock Compensation Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jul. 04, 2015
Jun. 28, 2014
Jul. 04, 2015
Jun. 28, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated stock-based compensation expense $ 3,293 $ 3,397 $ 10,732 $ 10,272
Total stock-based compensation cost capitalized as part of inventory 600 600 1,900 1,900
Total stock-based compensation cost amortized into income 700 600 1,900 1,800
Total compensation cost, unvested stock-based awards granted but not yet recognized 23,000   23,000  
Total compensation cost, unvested stock-based awards granted, but not yet recognized, forfeitures 700   $ 700  
Total compensation cost, weighted-average period of amortization (in years)     1 year 4 months 24 days  
Cost of Sales [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated stock-based compensation expense 664 611 $ 1,937 1,797
Research and development        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated stock-based compensation expense 529 504 1,415 1,526
Selling, general and administrative        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated stock-based compensation expense 3,372 3,552 10,385 10,884
Income tax benefit        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated stock-based compensation expense (1,272) $ (1,270) (3,005) (3,935)
Employee Stock [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total compensation cost, unvested stock-based awards granted but not yet recognized $ 600   $ 600  
Total compensation cost, weighted-average period of amortization (in years)     6 months  
PeriodEnd [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation cost capitalized as part of inventory     $ 700 $ 700