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BUSINESS SEGMENTS - Depreciation, Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | $ 15,523 | $ 15,595 | $ 47,067 | $ 46,172
CAPITAL EXPENDITURES | 12,232 | 10,376 | 34,751 | 27,794
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | 15,370 | 15,453 | 46,611 | 45,757
CAPITAL EXPENDITURES | 12,207 | 10,339 | 34,444 | 27,547
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | 153 | 142 | 456 | 415
CAPITAL EXPENDITURES | 25 | 37 | 307 | 247
Consumer and Professional Products | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | 8,197 | 8,158 | 24,650 | 24,148
CAPITAL EXPENDITURES | 7,029 | 3,187 | 14,561 | 11,327
Home and Building Products | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | 4,507 | 4,626 | 13,975 | 13,683
CAPITAL EXPENDITURES | 3,640 | 5,088 | 15,135 | 10,423
Defense Electronics | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DEPRECIATION and AMORTIZATION | 2,666 | 2,669 | 7,986 | 7,926
CAPITAL EXPENDITURES | $ 1,538 | $ 2,064 | $ 4,748 | $ 5,797

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