BUSINESS SEGMENTS - Segment EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 134,815	$ 60,080	$ 333,325	$ 193,299
Segment adjusted EBITDA	148,220	71,544	373,049	230,109
Depreciation and amortization	(17,688)	(13,306)	(47,021)	(39,118)
Debt extinguishment, net	(5,287)	0	(5,287)	0
Fair value step-up of acquired inventory sold			(5,401)	0
Income before taxes from continuing operations	76,050	26,893	182,765	92,546
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	(17,550)	(13,156)	(46,609)	(38,695)
Operating Segments | Consumer and Professional Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	28,373	29,388	92,431	99,524
Depreciation and amortization	(13,434)	(8,781)	(33,831)	(25,600)
Operating Segments | Home and Building Products
Segment Reporting Information [Line Items]
Adjusted EBITDA	119,847	42,156	280,618	130,585
Depreciation and amortization	(4,116)	(4,375)	(12,778)	(13,095)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unallocated amounts, excluding depreciation	(13,405)	(11,464)	(39,724)	(36,810)
Net interest expense	(23,961)	(15,800)	(60,985)	(46,973)
Depreciation and amortization	(17,688)	(13,306)	(47,021)	(39,118)
Debt extinguishment, net	(5,287)	0	(5,287)	0
Restructuring charges	(5,909)	(4,081)	(12,391)	(14,662)
Acquisition costs	0	0	(9,303)	0
Strategic review - retention and other	(3,220)	0	(3,220)	0
Proxy expenses	0	0	(6,952)	0
Fair value step-up of acquired inventory sold	$ (2,700)	$ 0	$ (5,401)	$ 0