BUSINESS SEGMENTS - Segment EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 136,876	$ 139,262	$ 245,436	$ 198,510
Segment adjusted EBITDA	151,506	152,318	273,842	224,829
Depreciation and amortization	(17,254)	(16,252)	(34,367)	(29,333)
Gain on sale of building	0	0	10,852	0
Intangible asset impairment	(100,000)	0	(100,000)	0
Fair value step-up of acquired inventory sold			0	(2,701)
Income (loss) before taxes from continuing operations	(90,159)	82,798	(22,139)	106,715
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	(17,114)	(16,115)	(34,087)	(29,059)
Operating Segments | Consumer and Professional Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	19,635	47,844	17,826	64,058
Depreciation and amortization	(13,303)	(11,791)	(26,430)	(20,397)
Operating Segments | Home and Building Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	131,871	104,474	256,016	160,771
Depreciation and amortization	(3,811)	(4,324)	(7,657)	(8,662)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated amounts, excluding depreciation	(14,630)	(13,056)	(28,406)	(26,319)
Net interest expense	(24,643)	(21,376)	(49,187)	(37,024)
Depreciation and amortization	(17,254)	(16,252)	(34,367)	(29,333)
Gain on sale of building	0	0	10,852	0
Strategic review - retention and other	6,190	0	14,422	0
Proxy expenses	(614)	(4,661)	(2,117)	(6,952)
Acquisition costs	0	(6,708)	0	(9,303)
Restructuring charges	(78,334)	(4,766)	(78,334)	(6,482)
Intangible asset impairment	(100,000)	0	(100,000)	0
Fair value step-up of acquired inventory sold	$ 0	$ (2,701)	$ 0	$ (2,701)