OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 356,084	$ 300,370	$ 1,012,959	$ 859,976
Depreciation	4,981	4,563	14,993	13,075
Amortization	10,439	7,362	29,610	21,991
Operating income	69,854	58,510	189,269	160,704
Capital expenditures	7,567	4,307	23,113	13,767
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(2,684)	(3,452)	(7,393)	(8,894)
Depreciation	54	41	166	112
Amortization	165	165	496	496
Operating income	(5,724)	(5,112)	(18,768)	(12,790)
Capital expenditures	17	184	407	310
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	222,553	206,599	647,419	591,431
Depreciation	3,049	2,834	8,973	7,927
Amortization	4,169	3,568	12,414	9,636
Operating income	41,969	39,250	118,757	107,498
Capital expenditures	5,034	2,523	13,449	9,000
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	136,215	97,223	372,933	277,439
Depreciation	1,878	1,688	5,854	5,036
Amortization	6,105	3,629	16,700	11,859
Operating income	33,609	24,372	89,280	65,996
Capital expenditures	$ 2,516	$ 1,600	$ 9,257	$ 4,457