Valuation And Qualifying Accounts (Details) (USD $) In Thousands	12 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 03, 2009
Contract Loss Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 40,810	$ 50,190	$ 20,536
Additions charged to costs and expenses	53,197	32,298	23,529
Deductions	48,666	39,799	24,766
Acquisitions		(1,895)	30,927
Foreign exchange impact and other	(168)	16	(36)
Balance at end of year	45,173	40,810	50,190
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	4,813	4,014	3,349
Additions charged to costs and expenses	1,230	1,511	1,297
Deductions	1,260	599	655
Foreign exchange impact and other	(65)	(113)	23
Balance at end of year	4,718	4,813	4,014
Reserve for Inventory Valuation [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	85,608	73,282	62,529
Additions charged to costs and expenses	17,566	20,395	18,340
Deductions	8,804	7,900	6,944
Foreign exchange impact and other	100	(169)	(643)
Balance at end of year	94,470	85,608	73,282
Deferred Tax Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	7,352	9,476	7,957
Additions charged to costs and expenses	257	946	2,545
Deductions	3,151	2,664	915
Foreign exchange impact and other	(352)	(406)	(111)
Balance at end of year	$ 4,106	$ 7,352	$ 9,476