REPORTABLE SEGMENTS - Schedule of summary of reconciliation of segment profit before taxes and operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 458,158	$ 246,410	$ 208,197
Segment Adjusted EBITDA	512,046	296,688	257,684
Depreciation and amortization	(64,658)	(52,302)	(52,100)
Goodwill and intangible asset impairments	(517,027)	0	0
Debt extinguishment, net	(4,529)	0	(7,925)
Fair value step-up of acquired inventory sold	(5,401)	0	0
Income (loss) before taxes from continuing operations	(270,879)	109,955	67,481
Consumer and Professional Products
Segment Reporting Information [Line Items]
Depreciation and amortization	(47,562)	(34,433)	(32,788)
Operating
Segment Reporting Information [Line Items]
Depreciation and amortization	(64,101)	(51,803)	(51,149)
Operating | Consumer and Professional Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	99,308	115,673	104,053
Operating | Home and Building Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	412,738	181,015	153,631
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated amounts, excluding depreciation	(53,888)	(50,278)	(49,487)
Net interest expense	(84,164)	(62,735)	(65,795)
Depreciation and amortization	(64,658)	(52,302)	(52,100)
Goodwill and intangible asset impairments	(517,027)	0	0
Restructuring charges	(16,782)	(21,418)	(13,669)
Debt extinguishment, net	(4,529)	0	(7,925)
Acquisition contingent consideration	0	0	1,733
Acquisition costs	(9,303)	0	(2,960)
Strategic review - retention and other	(9,683)	0	0
Special dividend ESOP charges	(10,538)	0	0
Proxy expenses	(6,952)	0	0
Fair value step-up of acquired inventory sold	$ (5,401)	$ 0	$ 0