OPERATING SEGMENTS (Assets) (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 3,364,835	$ 2,969,211
Other Primarily Corporate and Intersegment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	335,923	176,442
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,201,852	1,149,737
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,827,060	$ 1,643,032