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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

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