OPERATING SEGMENTS OPERATING SEGMENTS (Total assets) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,969,211	$ 2,653,396
Operating Segments [Member] | Flight Support Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,149,737	1,093,858
Operating Segments [Member] | Electronic Technologies Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,643,032	1,391,997
Corporate And Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 176,442	$ 167,541