Acquisition (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended		0 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Sep. 02, 2011 4C Solutions Inc [Member]	Sep. 30, 2011 4C Solutions Inc [Member]	May 31, 2011 MKS Inc [Member]
Revenue of acquirees since acquisition dates, actual	$ 20,300,000		$ 61,000,000
Acquisition-related cost	0	6,000,000	2,500,000	6,600,000
Cash paid to acquire business, net of cash acquired			1,170,000	265,153,000	14,900,000
Cash acquired from acquisition					100,000		33,200,000
Contingent purchase price included in accrued expenses and other current liabilities						1,200,000
Purchase price of acquired entity							$ 265,200,000