REVENUE (Disaggregation of Revenue, by Product Line) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 466,651	$ 468,146	$ 884,553	$ 974,421
Flight Support Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		230,280	251,964	429,614	553,031
Flight Support Group [Member] | Aftermarket Replacement Parts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	135,894	141,192	254,328	309,459
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]	50,706	52,629	93,118	121,916
Flight Support Group [Member] | Specialty Products [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[3]	43,680	58,143	82,168	121,656
Electronic Technologies Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		243,089	218,955	466,639	427,366
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]	178,259	168,962	345,348	329,675
Electronic Technologies Group [Member] | Other Electronic Components [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[5]	64,830	49,993	121,291	97,691
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		$ (6,718)	$ (2,773)	$ (11,700)	$ (5,976)

[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 (TSCM) 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, silicone material for a variety of demanding applications and rugged small form-factor embedded computing solutions.