Commitments and Contingencies (Details) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended		1 Months Ended
	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Jan. 01, 2012	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jan. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Oct. 03, 2010	Apr. 30, 2012 BPR Triax	Apr. 17, 2012 BPR Triax employee	Dec. 27, 2009 Lawsuit for misappropriation of trade secrets	Apr. 30, 2012 Lawsuit for misappropriation of trade secrets Advanced Management Technology, Inc.	Jul. 31, 2008 Lawsuit for misappropriation of trade secrets Advanced Management Technology, Inc.	Dec. 31, 2007 Lawsuit for misappropriation of trade secrets Advanced Management Technology, Inc.
Loss contingencies
Awarded compensatory damages																	$ 5,800,000
Awarded punitive damages																	17,000,000
Reduced compensatory damages																2,000,000
Reduced punitive damages																5,800,000
Attorneys' fees and costs														2,900,000
Payment for judgment, including post-judgment interest															14,400,000
Number of employees of BPR Triax charged with allegations of corruption													2
Annual revenue	$ 719,405,000	$ 684,698,000	$ 624,345,000	$ 682,627,000	$ 675,662,000	$ 673,792,000	$ 612,566,000	$ 611,124,000	$ 2,711,075,000	$ 2,573,144,000	$ 2,201,232,000	$ 7,000,000