OPERATING SEGMENTS (Details) - USD ($) $ in Thousands		3 Months Ended
		Jan. 31, 2021	Jan. 31, 2020
Segment Reporting Information [Line Items]
Revenues		$ 417,902	$ 506,275
Depreciation		6,755	6,800
Amortization		16,248	14,783
Operating income		80,285	110,990
Capital expenditures		15,509	6,850
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	(4,982)	(3,203)
Depreciation	[1]	246	255
Amortization	[1]	274	246
Operating income	[1]	(5,665)	(8,546)
Capital expenditures	[1]	0	5
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		199,334	301,067
Depreciation		3,450	3,617
Amortization		5,136	4,859
Operating income		25,822	62,045
Capital expenditures		1,988	4,118
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		223,550	208,411
Depreciation		3,059	2,928
Amortization		10,838	9,678
Operating income		60,128	57,491
Capital expenditures		$ 13,521	$ 2,727

[1] Intersegment activity principally consists of net sales from the ETG to the FSG.