Stock-Based Compensation (Stock Compensation Expense) (Details) (USD $)	3 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	0
Allocated stock-based compensation expense	$ 3,511,000	$ 2,694,000
Total stock-based compensation cost capitalized as part of inventory	600,000	500,000
Total stock-based compensation cost amortized into income	400,000	400,000
Total compensation cost, unvested stock-based awards granted but not yet recognized	26,200,000
Total compensation cost, unvested stock-based awards granted, but not yet recognized, forfeitures	1,300,000
Total compensation cost, weighted-average period of amortization (in years)	1 year 3 months 18 days
Excess tax benefits as cash flow from financing activites	0	1,681,000
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	435,000	369,000
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	476,000	393,000
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	4,083,000	3,260,000
Income tax benefit
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated stock-based compensation expense	(1,483,000)	(1,328,000)
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	600,000
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	$ 700,000	$ 500,000