Restructuring and Other Charges (Restructuring Reserve) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Oct. 01, 2010
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	$ 2,028	$ 2,189	$ 3,279
Charges to costs and expenses	7,752	2,363	(1,040)
Other	2	328	451
Cash payments	(8,054)	(2,852)	(1,541)
Restructuring Reserve, Ending Balance	1,728	2,028	2,189
Facility Closings [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	819	1,012	1,210
Charges to costs and expenses	553	0
Other	0	0	450
Cash payments	(228)	(193)	(648)
Restructuring Reserve, Ending Balance	1,144	819	1,012
License and Software Write-offs and Other [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	707	1,177	1,586
Charges to costs and expenses	0	0
Other	0	0	248
Cash payments	(572)	(470)	(657)
Restructuring Reserve, Ending Balance	135	707	1,177
Workforce Reductions [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance	502	0	483
Charges to costs and expenses	7,199	2,363
Other	2	328	(247)
Cash payments	(7,254)	(2,189)	(236)
Restructuring Reserve, Ending Balance	$ 449	$ 502	$ 0