Stockholders' Equity (Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 28, 2012 Y
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Balance outstanding at September 30, 2011	12,403
Granted	2,609
Stock Options Assumed in Business Combination	1,122	[1]
Exercised	(3,574)
Canceled/forfeited	(676)
Balance outstanding at Septermber 28, 2012	11,884
Stock Options, Exercisable, Shares	5,009
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock Options, Outstanding, Weighted average exercise price, Beginning Balance	$ 13.45
Granted Weighted average exercise price	$ 18.91
Exercised, Weighted average exercise price	$ 10.90
Canceled/forfeited, Weighted average exercise price	$ 23.44
Stock Options, Outstanding, Weighted average exercise price, Ending Balance	$ 15.57
Stock Options, Exercisable, Weighted average exercise price	$ 11.63
Weighted average remaining contractual life (in years)	4.6
Stock Options, Exercisable, Weighted average remaining contractual life (in years)	3.8
Aggregate Intrincis value	$ 100,504
Stock Options, Exercisable, Aggregate intrinsic value	$ 62,098

[1] Includes stock options assumed in the acquisition of AATI, see Note 3.