OPERATING SEGMENTS (Total Assets) (Details) - USD ($) $ in Thousands	Apr. 30, 2019	Oct. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,853,640	$ 2,653,396
Other Primarily Corporate and Intersegment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	179,553	167,541
Flight Support Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,145,039	1,093,858
Electronic Technologies Group [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,529,048	$ 1,391,997