REVENUE (Disaggregation of Revenue, by Industry) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		$ 515,648	$ 430,602	$ 981,794	$ 835,012
Flight Support Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		308,251	267,836	595,464	522,557
Flight Support Group [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		249,225	220,083	484,398	429,674
Flight Support Group [Member] | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		45,969	36,312	87,503	71,094
Flight Support Group [Member] | Other Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	[1]	13,057	11,441	23,563	21,789
Electronic Technologies Group [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		214,451	168,722	398,880	324,380
Electronic Technologies Group [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		22,876	14,935	42,171	30,458
Electronic Technologies Group [Member] | Defense and Space [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		135,952	109,130	251,171	206,212
Electronic Technologies Group [Member] | Other Industries [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	[2]	55,623	44,657	105,538	87,710
Corporate And Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer		$ (7,054)	$ (5,956)	$ (12,550)	$ (11,925)

[1] ⁽¹⁾  Principally industrial products.

[2] ⁽²⁾  Principally other electronics and medical products.