BUSINESS SEGMENTS - Depreciation, Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	$ 15,883	$ 15,719	$ 31,149	$ 31,544
CAPITAL EXPENDITURES	12,060	9,347	23,986	22,519
Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	15,733	15,566	30,949	31,241
CAPITAL EXPENDITURES	12,058	9,277	23,984	22,237
Corporate
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	150	153	200	303
CAPITAL EXPENDITURES	2	70	2	282
Consumer and Professional Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	8,620	8,222	16,819	16,453
CAPITAL EXPENDITURES	6,813	3,800	13,720	7,532
Home and Building Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	4,379	4,668	8,720	9,468
CAPITAL EXPENDITURES	1,998	3,556	4,113	11,495
Defense Electronics | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	2,734	2,676	5,410	5,320
CAPITAL EXPENDITURES	$ 3,247	$ 1,921	$ 6,151	$ 3,210