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OPERATING SEGMENTS (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2017 | Jul. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 391,500 | $ 356,084 | $ 1,103,589 | $ 1,012,959
Depreciation | 5,600 | 4,981 | 16,118 | 14,993
Amortization | 10,811 | 10,439 | 30,794 | 29,610
Operating income | 76,122 | 69,854 | 217,214 | 189,269
Capital expenditures | 6,907 | 7,567 | 20,445 | 23,113
Corporate And Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | (4,326) | (2,684) | (12,281) | (7,393)
Depreciation | 54 | 54 | 160 | 166
Amortization | 204 | 165 | 548 | 496
Operating income | (9,085) | (5,724) | (22,010) | (18,768)
Capital expenditures | 76 | 17 | 220 | 407
Flight Support Group [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 257,966 | 222,553 | 710,676 | 647,419
Depreciation | 3,378 | 3,049 | 9,654 | 8,973
Amortization | 4,885 | 4,169 | 13,088 | 12,414
Operating income | 46,664 | 41,969 | 132,771 | 118,757
Capital expenditures | 3,745 | 5,034 | 12,305 | 13,449
Electronic Technologies Group [Member] | Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 137,860 | 136,215 | 405,194 | 372,933
Depreciation | 2,168 | 1,878 | 6,304 | 5,854
Amortization | 5,722 | 6,105 | 17,158 | 16,700
Operating income | 38,543 | 33,609 | 106,453 | 89,280
Capital expenditures | $ 3,086 | $ 2,516 | $ 7,920 | $ 9,257

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