OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 466,146	$ 404,410
Depreciation	6,212	5,628
Amortization	13,825	13,396
Operating income	97,947	79,560
Capital expenditures	5,907	7,577
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(5,496)	(5,969)
Depreciation	251	62
Amortization	246	345
Operating income	(6,535)	(9,529)
Capital expenditures	0	3,537
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	287,213	254,721
Depreciation	3,355	3,292
Amortization	4,803	4,947
Operating income	52,880	45,869
Capital expenditures	2,849	2,297
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	184,429	155,658
Depreciation	2,606	2,274
Amortization	8,776	8,104
Operating income	51,602	43,220
Capital expenditures	$ 3,058	$ 1,743