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REPORTABLE SEGMENTS (Details) - Schedule of Summary of Reconciliation of Segment Profit Before Taxes and Operations - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 574,164 | $ 574,970 | $ 549,633 | $ 510,522 | $ 545,505 | $ 516,550 | $ 478,560 | $ 437,303 | $ 2,209,289 | $ 1,977,918 | $ 1,524,997
Segment adjusted EBITDA |  |  |  |  |  |  |  |  | 245,942 | 213,463 | 172,697
Unallocated amounts, excluding depreciation |  |  |  |  |  |  |  |  | (46,302) | (45,343) | (41,918)
Net interest expense |  |  |  |  |  |  |  |  | (67,260) | (63,871) | (51,449)
Depreciation and amortization |  |  |  |  |  |  |  |  | (61,290) | (55,334) | (47,398)
Acquisition contingent consideration | $ (1,333) |  |  |  |  |  |  |  | 1,646 | 0 | 0
Acquisition costs |  |  |  |  |  |  |  |  | 0 | (7,597) | (9,617)
Special dividend charges |  |  |  |  |  | (2,125) |  |  |  | (2,588) |
Loss on pension settlement |  |  |  |  |  |  |  |  | 0 | 0 | 5,137
Secondary equity offering costs |  |  |  |  |  | $ (795) |  |  | 0 | (1,205) | 0
Income (loss) before taxes from continuing operations |  |  |  |  |  |  |  |  | 72,178 | 33,810 | 16,698
Consolidated depreciation and amortization |  |  |  |  |  |  |  |  | 61,848 | 55,803 | 47,878
Capital expenditures |  |  |  |  |  |  |  |  | 45,361 | 50,138 | 34,937
Consumer And Professional Products Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,000,608 | 953,612 | 545,269
Segment adjusted EBITDA |  |  |  |  |  |  |  |  | 90,677 | 77,061 | 45,002
Depreciation and amortization |  |  |  |  |  |  |  |  | (32,289) | (30,816) | (25,207)
Capital expenditures |  |  |  |  |  |  |  |  | 17,828 | 23,040 | 14,259
Home and Building Products (HBP) [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 873,640 | 697,969 | 568,001
Segment adjusted EBITDA |  |  |  |  |  |  |  |  | 120,161 | 100,339 | 81,764
Depreciation and amortization |  |  |  |  |  |  |  |  | (18,334) | (13,717) | (11,340)
Capital expenditures |  |  |  |  |  |  |  |  | 16,498 | 13,547 | 10,217
Defense Electronics Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 335,041 | 326,337 | 411,727
Segment adjusted EBITDA |  |  |  |  |  |  |  |  | 35,104 | 36,063 | 45,931
Depreciation and amortization |  |  |  |  |  |  |  |  | (10,667) | (10,801) | (10,851)
Capital expenditures |  |  |  |  |  |  |  |  | 10,492 | 10,941 | 8,204
Operating [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 44,818 | 47,528 | 32,680
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated depreciation and amortization |  |  |  |  |  |  |  |  | 558 | 469 | 480
Capital expenditures |  |  |  |  |  |  |  |  | 543 | 2,610 | 2,257
Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Special dividend charges |  |  |  |  |  |  |  |  | 0 | (3,220) | 0
Postretirement Life Insurance [Member] | Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss on pension settlement |  |  |  |  |  |  |  |  | $ 0 | $ (2,614) | $ 0

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