Discontinued Operations Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Thousands	Jul. 01, 2016	Oct. 02, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	$ 7,341	$ 6,906
Inventories	9,251	20,604
Prepaid expenses	347	341
Deferred income tax benefits	0
Income tax refundable	1,095
Current Assets of Businesses Held for Sale	18,034	27,851
Net property, plant and equipment	8,038	17,673
Intangibles, net	1,759	5,873
Deferred income tax benefits	(392)	(147)
Other assets	1,330	1,518
Non-Current Assets of Businesses Held for Sale	10,735	24,917
Accounts payable	1,737	6,715
Accrued liabilities	10,546	10,391
Current Liabilities of Businesses Held for Sale	12,283	17,106
Deferred income tax liabilities	902	194
Other liabilities	320	2,215
Non-Current Liabilities of Businesses Held for Sale	1,222	2,409
Net Assets of Businesses Held for Sale	15,264	33,253
Avionics & Controls
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	3,032	5,360
Inventories	8,956	14,763
Prepaid expenses	145	156
Deferred income tax benefits	0
Income tax refundable	0
Current Assets of Businesses Held for Sale	12,133	20,279
Net property, plant and equipment	5,349	5,474
Intangibles, net	0	945
Deferred income tax benefits	(392)	(147)
Other assets	0	0
Non-Current Assets of Businesses Held for Sale	4,957	6,272
Accounts payable	251	1,878
Accrued liabilities	7,666	8,340
Current Liabilities of Businesses Held for Sale	7,917	10,218
Deferred income tax liabilities	0	0
Other liabilities	0	2,215
Non-Current Liabilities of Businesses Held for Sale	0	2,215
Net Assets of Businesses Held for Sale	9,173	14,118
Sensors & Systems
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	0	0
Inventories	0	0
Prepaid expenses	0	0
Deferred income tax benefits	0
Income tax refundable	0
Current Assets of Businesses Held for Sale	0	0
Net property, plant and equipment	0	0
Intangibles, net	0	0
Deferred income tax benefits	0	0
Other assets	0	0
Non-Current Assets of Businesses Held for Sale	0	0
Accounts payable	0	0
Accrued liabilities	0	0
Current Liabilities of Businesses Held for Sale	0	0
Deferred income tax liabilities	0	0
Other liabilities	0	0
Non-Current Liabilities of Businesses Held for Sale	0	0
Net Assets of Businesses Held for Sale	0	0
Advanced Materials
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	4,309	1,546
Inventories	295	5,841
Prepaid expenses	202	185
Deferred income tax benefits	0
Income tax refundable	1,095
Current Assets of Businesses Held for Sale	5,901	7,572
Net property, plant and equipment	2,689	12,199
Intangibles, net	1,759	4,928
Deferred income tax benefits	0	0
Other assets	1,330	1,518
Non-Current Assets of Businesses Held for Sale	5,778	18,645
Accounts payable	1,486	4,837
Accrued liabilities	2,880	2,051
Current Liabilities of Businesses Held for Sale	4,366	6,888
Deferred income tax liabilities	902	194
Other liabilities	320	0
Non-Current Liabilities of Businesses Held for Sale	1,222	194
Net Assets of Businesses Held for Sale	$ 6,091	$ 19,135