BUSINESS SEGMENTS (Details) - Summary of Segment Assets - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Segment assets:
Continuing Assets	$ 2,078,020	$ 1,499,528
Assets of discontinued operations	3,280	374,013
Total Assets	2,081,300	1,873,541
Home And Building Products [Member]
Segment assets:
Continuing Assets	1,478,951	1,084,103
Telephonics [Member]
Segment assets:
Continuing Assets	332,551	343,445
Operating Segments [Member]
Segment assets:
Continuing Assets	1,811,502	1,427,548
Corporate, Non-Segment [Member]
Segment assets:
Continuing Assets	$ 266,518	$ 71,980