BUSINESS SEGMENTS (Details) - Summary of Segment Assets - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Segment assets:
Continuing Assets	$ 2,098,395	$ 1,499,528
Assets of discontinued operations	3,256	374,013
Total Assets	2,101,651	1,873,541
Home And Building Products [Member]
Segment assets:
Continuing Assets	1,660,665	1,084,103
Telephonics [Member]
Segment assets:
Continuing Assets	337,352	343,445
Operating Segments [Member]
Segment assets:
Continuing Assets	1,998,017	1,427,548
Corporate, Non-Segment [Member]
Segment assets:
Continuing Assets	$ 100,378	$ 71,980