OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 350,648	$ 291,421	$ 656,875	$ 559,606
Depreciation	5,154	4,523	10,012	8,512
Amortization	10,108	7,714	19,171	14,629
Operating income	66,794	55,788	119,415	102,194
Capital expenditures	9,856	5,206	15,546	9,460
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(2,208)	(2,349)	(4,709)	(5,442)
Depreciation	56	36	112	71
Amortization	166	166	331	331
Operating income	(7,916)	(3,963)	(13,044)	(7,678)
Capital expenditures	88	117	390	126
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	220,290	202,775	424,866	384,832
Depreciation	2,974	2,840	5,924	5,093
Amortization	4,117	3,509	8,245	6,068
Operating income	41,308	37,545	76,788	68,248
Capital expenditures	4,710	3,863	8,415	6,477
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	132,566	90,995	236,718	180,216
Depreciation	2,124	1,647	3,976	3,348
Amortization	5,825	4,039	10,595	8,230
Operating income	33,402	22,206	55,671	41,624
Capital expenditures	$ 5,058	$ 1,226	$ 6,741	$ 2,857