Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Contract Loss Reserve
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	$ 35,984	$ 44,228	$ 48,428
Additions charged to costs and expenses	24,073	35,692	38,717
Deductions	29,120	43,909	43,567
Acquisitions	0	0	638
Foreign exchange impact and other	(515)	(27)	12
Balance at end of year	30,422	35,984	44,228
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	4,341	4,499	5,754
Additions charged to costs and expenses	2,889	3,192	1,779
Deductions	1,624	3,248	3,006
Acquisitions	0	0	0
Foreign exchange impact and other	(320)	(102)	(28)
Balance at end of year	5,286	4,341	4,499
Reserve for Inventory Valuation
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	98,547	94,446	96,519
Additions charged to costs and expenses	21,117	17,791	13,848
Deductions	17,652	12,114	15,735
Acquisitions	0	0	0
Foreign exchange impact and other	(2,216)	(1,576)	(186)
Balance at end of year	99,796	98,547	94,446
Deferred Tax Valuation Allowance
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year	5,316	4,006	1,746
Additions charged to costs and expenses	2,006	1,585	2,959
Deductions	15	108	708
Acquisitions	0	0	0
Foreign exchange impact and other	(665)	(167)	9
Balance at end of year	$ 6,642	$ 5,316	$ 4,006