REVENUE (Disaggregation of Revenue, by Industry) (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] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		163,026	188,655	298,082	428,578
Flight Support Group [Member] | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		56,254	54,142	110,298	104,395
Flight Support Group [Member] | Other Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	11,000	9,167	21,234	20,058
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] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		19,724	21,721	37,275	42,059
Electronic Technologies Group [Member] | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax		149,361	139,491	291,453	272,601
Electronic Technologies Group [Member] | Other Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	[2]	74,004	57,743	137,911	112,706
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] Principally industrial products.

[2] Principally other electronics and medical products.