Stock-Based Compensation (Stock Compensation Expense) (Details) (USD $)	3 Months Ended
	Dec. 31, 2011 years	Jan. 01, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	$ 2,694,000	$ 2,248,000
Total stock-based compensation cost capitalized as part of inventory	500,000	400,000
Total stock-based compensation cost amortized into income	400,000	200,000
Total stock-based compensation cost remained in inventory	500,000	400,000
Total compensation cost, unvested stock-based awards granted but not yet recognized	24,600,000
Total compensation cost, unvested stock-based awards granted, but not yet recognized, forfeitures	2,700,000
Total compensation cost, weighted-average period of amortization (in years)	1.6
Excess tax benefits as cash flow from financing activites	1,681,000	1,678,000
Employee Stock Purchase Plans
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total compensation cost, unvested stock-based awards granted but not yet recognized	700,000
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	369,000	244,000
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	393,000	337,000
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	3,260,000	2,342,000
Income tax benefit
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	$ (1,328,000)	$ (675,000)