OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales	$ 328,672	$ 300,370	$ 291,421	$ 268,185	$ 292,223	$ 291,030	$ 282,232	$ 266,826	$ 1,188,648	$ 1,132,311	$ 1,008,757
Depreciation									17,830	17,068	13,372
Amortization									30,077	30,689	23,418
Depreciation and amortization									47,907	47,757	36,790
Operating income									229,656	203,388	183,590
Capital expenditures									18,249	16,410	18,328
Total assets	1,736,387				1,489,214				1,736,387	1,489,214	1,533,015
Flight Support Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									809,700	762,801	665,148
Depreciation									10,859	9,809	7,997
Amortization									13,470	10,034	6,617
Operating income									149,798	136,480	122,058
Capital expenditures									11,737	9,437	10,190
Total assets	868,218				676,824				868,218	676,824	679,839
Electronic Technologies Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									390,982	379,404	350,033
Depreciation									6,803	7,113	5,242
Amortization									15,945	19,993	16,150
Operating income									98,833	88,914	83,063
Capital expenditures									6,201	6,327	7,748
Total assets	746,018				703,144				746,018	703,144	759,807
Other Primarily Corporate and Inter Segment [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									(12,034)	(9,894)	(6,424)
Depreciation									168	146	133
Amortization									662	662	651
Operating income									(18,975)	(22,006)	(21,531)
Capital expenditures									311	646	390
Total assets	$ 122,151				$ 109,246				$ 122,151	$ 109,246	$ 93,369