Discontinued Operations Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Oct. 02, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	$ 6,681	$ 6,906
Inventories	8,468	20,604
Prepaid expenses	230	341
Income tax refundable	71
Current Assets of Businesses Held for Sale	15,450	27,851
Net Property, plant and equipment	8,237	17,673
Intangibles, net	1,856	5,873
Deferred income tax benefits (liabilities)	8	(147)
Other assets	1,299	1,518
Non-Current Assets of Businesses Held for Sale	11,400	24,917
Accounts payable	1,904	6,715
Accrued liabilities	8,909	10,391
Current Liabilities of Businesses Held for Sale	10,813	17,106
Deferred income tax liabilities		194
Other liabilities	320	2,215
Non-Current Liabilities of Businesses Held for Sale	320	2,409
Net Assets of Businesses Held for Sale	15,717	33,253
Avionics & Controls
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Accounts receivable, net	2,588	5,360
Inventories	8,070	14,763
Prepaid expenses	127	156
Income tax refundable	0
Current Assets of Businesses Held for Sale	10,785	20,279
Net Property, plant and equipment	5,368	5,474
Intangibles, net	0	945
Deferred income tax benefits (liabilities)	(392)	(147)
Other assets	0	0
Non-Current Assets of Businesses Held for Sale	4,976	6,272
Accounts payable	441	1,878
Accrued liabilities	7,000	8,340
Current Liabilities of Businesses Held for Sale	7,441	10,218
Deferred income tax liabilities		0
Other liabilities	0	2,215
Non-Current Liabilities of Businesses Held for Sale	0	2,215
Net Assets of Businesses Held for Sale	8,320	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
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 (liabilities)	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
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	4,093	1,546
Inventories	398	5,841
Prepaid expenses	103	185
Income tax refundable	71
Current Assets of Businesses Held for Sale	4,665	7,572
Net Property, plant and equipment	2,869	12,199
Intangibles, net	1,856	4,928
Deferred income tax benefits (liabilities)	400	0
Other assets	1,299	1,518
Non-Current Assets of Businesses Held for Sale	6,424	18,645
Accounts payable	1,463	4,837
Accrued liabilities	1,909	2,051
Current Liabilities of Businesses Held for Sale	3,372	6,888
Deferred income tax liabilities		194
Other liabilities	320	0
Non-Current Liabilities of Businesses Held for Sale	320	194
Net Assets of Businesses Held for Sale	$ 7,397	$ 19,135