BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 768,179	$ 584,218	$ 2,139,545	$ 1,700,423
United States
Disaggregation of Revenue [Line Items]
Revenue	632,333	453,077	1,709,364	1,309,373
Europe
Disaggregation of Revenue [Line Items]
Revenue	31,120	43,798	96,277	95,960
Canada
Disaggregation of Revenue [Line Items]
Revenue	35,275	31,271	114,823	96,449
Australia
Disaggregation of Revenue [Line Items]
Revenue	55,142	51,437	191,679	184,668
All other countries
Disaggregation of Revenue [Line Items]
Revenue	14,309	4,635	27,402	13,973
Consumer and Professional Products
Disaggregation of Revenue [Line Items]
Revenue	362,634	324,826	1,056,819	947,739
Consumer and Professional Products | United States
Disaggregation of Revenue [Line Items]
Revenue	248,068	206,809	677,714	595,619
Consumer and Professional Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	31,113	43,767	96,226	95,888
Consumer and Professional Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	19,592	20,547	73,249	64,440
Consumer and Professional Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	55,142	51,437	191,679	184,668
Consumer and Professional Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	8,719	2,266	17,951	7,124
Consumer and Professional Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	47,126	50,165	136,363	146,325
Consumer and Professional Products | Retail
Disaggregation of Revenue [Line Items]
Revenue	191,284	154,212	538,355	447,206
Consumer and Professional Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	11,387	12,147	33,733	40,202
Consumer and Professional Products | Industrial
Disaggregation of Revenue [Line Items]
Revenue	24,748	12,708	57,122	32,197
Consumer and Professional Products | International excluding North America
Disaggregation of Revenue [Line Items]
Revenue	88,089	95,594	291,246	281,809
Home and Building Products
Disaggregation of Revenue [Line Items]
Revenue	405,545	259,392	1,082,726	752,684
Home and Building Products | United States
Disaggregation of Revenue [Line Items]
Revenue	384,265	246,268	1,031,650	713,754
Home and Building Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	7	31	51	72
Home and Building Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	15,683	10,724	41,574	32,009
Home and Building Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Home and Building Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	5,590	2,369	9,451	6,849
Home and Building Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	194,526	127,827	511,988	374,769
Home and Building Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	43,846	28,811	115,400	84,471
Home and Building Products | Commercial construction
Disaggregation of Revenue [Line Items]
Revenue	$ 167,173	$ 102,754	$ 455,338	$ 293,444