REVENUE (Disaggregation of Revenue, by Product Line) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 386,410	$ 532,324	$ 1,360,831	$ 1,514,118
Flight Support Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		178,158	320,016	731,189	915,480
Flight Support Group [Member] | Aftermarket Replacement Parts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	102,629	173,992	412,088	500,714
Flight Support Group [Member] | Repair and Overhaul Parts and Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[2]	32,601	76,270	154,517	216,887
Flight Support Group [Member] | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[3]	42,928	69,754	164,584	197,879
Electronic Technologies Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		210,919	216,129	638,285	615,009
Electronic Technologies Group [Member] | Electronic Components for Defense, Space and Aerospace [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[4]	165,189	160,031	494,864	459,445
Electronic Technologies Group [Member] | Other Electronic Components [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[5]	45,730	56,098	143,421	155,564
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ (2,667)	$ (3,821)	$ (8,643)	$ (16,371)

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

[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] 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] 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, high performance active antenna systems, and technical surveillance countermeasures equipment.

[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, custom molded cable assemblies and silicone material for a variety of demanding applications.