OPERATING SEGMENTS (Last three years, segment information) (Details) - USD ($) $ in Thousands		12 Months Ended
		Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales		$ 1,865,682	$ 1,787,009	$ 2,055,647
Depreciation		27,804	27,067	25,758
Amortization		65,215	61,494	57,739
Operating income		392,900	376,648	457,097
Capital expenditures		36,183	22,940	28,938
Flight Support Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales		927,089	924,812	1,240,183
Depreciation		13,992	14,339	13,793
Amortization		20,648	19,957	19,624
Operating income		151,930	143,051	242,029
Capital expenditures		8,915	10,843	17,036
Electronic Technologies Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales		959,170	874,987	834,522
Depreciation		12,839	11,722	10,957
Amortization		43,431	40,553	37,131
Operating income		277,306	258,814	245,743
Capital expenditures		26,496	12,025	11,826
Other Primarily Corporate and Inter Segment [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Depreciation		973	1,006	1,008
Amortization		1,136	984	984
Operating income		(36,336)	(25,217)	(30,675)
Capital expenditures		772	72	76
Consolidation, Eliminations [Member] | Other Primarily Corporate and Inter Segment [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales	[1]	$ (20,577)	$ (12,790)	$ (19,058)

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