OPERATING SEGMENTS OPERATING SEGMENTS, Information by Product Line (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Product Information [Line Items]
Net sales		$ 421,224	$ 391,500	$ 368,657	$ 343,432	$ 363,299	$ 356,084	$ 350,648	$ 306,227	$ 1,524,813	$ 1,376,258	$ 1,188,648
Flight Support Group [Member]
Product Information [Line Items]
Net sales										967,540	875,870	809,700
Flight Support Group [Member] | Aftermarket Replacement Parts [Member]
Product Information [Line Items]
Net sales	[1]									489,644	405,108	356,070
Flight Support Group [Member] | Repair and Overhaul Parts and Services [Member]
Product Information [Line Items]
Net sales	[2]									270,482	251,357	258,952
Flight Support Group [Member] | Specialty Products [Member]
Product Information [Line Items]
Net sales	[3]									207,414	219,405	194,678
Electronic Technologies Group [Member]
Product Information [Line Items]
Net sales										574,261	511,272	390,982
Electronic Technologies Group [Member] | Electronic Components for Defense, Space and Aerospace [Member]
Product Information [Line Items]
Net sales	[4]									420,991	371,297	255,095
Electronic Technologies Group [Member] | Other Electronic Components [Member]
Product Information [Line Items]
Net sales	[5]									153,270	139,975	135,887
Consolidation, Eliminations [Member] | Other Primarily Corporate and Inter Segment [Member]
Product Information [Line Items]
Net sales										$ (16,988)	$ (10,884)	$ (12,034)

[1] (1) Includes various jet engine and aircraft component replacement parts.

[2] (2) Includes primarily the sale of parts consumed in various repair and overhaul services on selected jet engine and aircraft components, avionics, instruments, composites and flight surfaces of commercial and military aircraft.

[3] (3) Includes primarily the sale of specialty components such as thermal insulation blankets, renewable/reusable insulation systems, advanced niche components, complex composite assemblies, and expanded foil mesh.

[4] (4) Includes various component parts such as electro-optical infrared simulation and test equipment, electro-optical laser products, electro-optical, microwave and other power equipment, high-speed interface products, power conversion products, underwater locator beacons, traveling wave tube amplifiers, microwave power modules, three-dimensional microelectronic and stacked memory products, crashworthy and ballistically self-sealing auxiliary fuel systems, radio frequency (RF) and microwave amplifiers, transmitters and receivers, high performance communications and electronic intercept receivers and tuners

[5] (5) Includes various component parts such as electromagnetic and radio interference shielding, high voltage interconnection devices, high voltage advanced power electronics, harsh environment connectivity products and custom molded cable assemblies.