OPERATING SEGMENTS (Assets) (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Oct. 31, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 3,595,168	$ 3,547,711
Other Primarily Corporate and Intersegment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	559,570	523,374
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,128,912	1,127,666
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,906,686	$ 1,896,671