BUSINESS SEGMENTS - Segment EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 134,231	$ 136,876	$ 250,582	$ 245,436
Segment adjusted EBITDA	149,045	151,506	279,303	273,842
Gain on sale of building	11	0	558	10,852
Intangible asset impairment	0	(100,000)	0	(100,000)
Income (loss) before taxes	88,573	(90,159)	148,715	(22,139)
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	(14,943)	(17,114)	(29,633)	(34,087)
Operating Segments | Home and Building Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	128,924	131,871	253,643	256,016
Depreciation and amortization	(3,772)	(3,811)	(7,405)	(7,657)
Operating Segments | Consumer and Professional Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	20,121	19,635	25,660	17,826
Depreciation and amortization	(11,171)	(13,303)	(22,228)	(26,430)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated amounts, excluding depreciation	(14,814)	(14,630)	(28,721)	(28,406)
Net interest expense	(25,512)	(24,643)	(50,387)	(49,187)
Depreciation and amortization	(15,080)	(17,254)	(29,903)	(34,367)
Restructuring charges	(2,401)	(78,334)	(14,801)	(78,334)
Gain on sale of building	11	0	558	10,852
Strategic review - retention and other	(2,676)	(6,190)	(7,334)	(14,422)
Proxy expenses	0	(614)	0	(2,117)
Intangible asset impairment	$ 0	$ (100,000)	$ 0	$ (100,000)