OPERATING SEGMENTS OPERATING SEGMENTS, Information by Product Line (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Product Information [Line Items]
Net sales		$ 476,884	$ 465,825	$ 430,602	$ 404,410	$ 421,224	$ 391,500	$ 368,657	$ 343,432	$ 1,777,721	$ 1,524,813	$ 1,376,258
Flight Support Group [Member]
Product Information [Line Items]
Net sales										1,097,937	967,540	875,870
Flight Support Group [Member] | Aftermarket Replacement Parts [Member]
Product Information [Line Items]
Net sales	[1]									582,562	489,644	405,108
Flight Support Group [Member] | Repair and Overhaul Parts and Services [Member]
Product Information [Line Items]
Net sales	[2]									286,454	270,482	251,357
Flight Support Group [Member] | Specialty Products [Member]
Product Information [Line Items]
Net sales	[3]									228,921	207,414	219,405
Electronic Technologies Group [Member]
Product Information [Line Items]
Net sales										701,827	574,261	511,272
Electronic Technologies Group [Member] | Electronic Components for Defense, Space and Aerospace [Member]
Product Information [Line Items]
Net sales	[4]									547,088	420,991	371,297
Electronic Technologies Group [Member] | Other Electronic Components [Member]
Product Information [Line Items]
Net sales	[5]									154,739	153,270	139,975
Consolidation, Eliminations [Member] | Other Primarily Corporate and Inter Segment [Member]
Product Information [Line Items]
Net sales										$ (22,043)	$ (16,988)	$ (10,884)

[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, emergency locator transmission 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 and high performance active antenna systems.

[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.