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BUSINESS SEGMENTS - Summary of Segment Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Sep. 30, 2019
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Continuing assets | $ 2,302,183 | $ 2,071,730
Assets of discontinued operations | 8,037 | 3,209
Total Assets | 2,310,220 | 2,074,939
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Continuing assets | 2,196,840 | 1,989,301
Operating Segments | Consumer and Professional Products |  |
Segment Reporting Information [Line Items] |  |
Continuing assets | 1,269,540 | 1,070,510
Operating Segments | Home and Building Products |  |
Segment Reporting Information [Line Items] |  |
Continuing assets | 592,038 | 571,216
Operating Segments | Defense Electronics |  |
Segment Reporting Information [Line Items] |  |
Continuing assets | 335,262 | 347,575
Corporate |  |
Segment Reporting Information [Line Items] |  |
Continuing assets | $ 105,343 | $ 82,429

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