OPERATING SEGMENTS (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 569,528	$ 471,707	$ 1,598,684	$ 1,356,260
Depreciation		7,693	6,810	22,389	20,344
Amortization		16,126	16,087	48,137	48,472
Operating Income (Loss)		128,747	100,838	350,346	277,871
Capital expenditures		8,146	8,186	24,357	30,124
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	[1]	(4,934)	(4,954)	(14,501)	(16,654)
Depreciation	[1]	250	242	743	728
Amortization	[1]	274	287	844	848
Operating Income (Loss)	[1]	(10,038)	(10,218)	(28,588)	(25,905)
Capital expenditures	[1]	296	473	399	490
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		330,259	237,118	909,253	666,732
Depreciation		4,082	3,330	11,493	10,159
Amortization		6,281	4,929	17,543	15,036
Operating Income (Loss)		70,756	42,059	189,329	103,357
Capital expenditures		3,971	1,792	12,084	5,885
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues		244,203	239,543	703,932	706,182
Depreciation		3,361	3,238	10,153	9,457
Amortization		9,571	10,871	29,750	32,588
Operating Income (Loss)		68,029	68,997	189,605	200,419
Capital expenditures		$ 3,879	$ 5,921	$ 11,874	$ 23,749

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