BUSINESS SEGMENTS - Depreciation, Amortization And Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	$ 15,719	$ 15,492	$ 31,544	$ 30,577
CAPITAL EXPENDITURES	9,347	9,021	22,519	17,418
Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	15,566	15,353	31,241	30,304
CAPITAL EXPENDITURES	9,277	8,829	22,237	17,208
Corporate
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	153	139	303	273
CAPITAL EXPENDITURES	70	192	282	210
Consumer and Professional Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	8,222	8,184	16,453	15,990
CAPITAL EXPENDITURES	3,800	3,806	7,532	8,140
Home and Building Products | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	4,668	4,548	9,468	9,057
CAPITAL EXPENDITURES	3,556	2,524	11,495	5,335
Defense Electronics | Operating Segments
Segment Reporting Information [Line Items]
DEPRECIATION and AMORTIZATION	2,676	2,621	5,320	5,257
CAPITAL EXPENDITURES	$ 1,921	$ 2,499	$ 3,210	$ 3,733