BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 672,880	$ 710,984	$ 1,316,033	$ 1,360,368
United States
Disaggregation of Revenue [Line Items]
Revenue	558,468	590,726	1,089,268	1,123,693
Europe
Disaggregation of Revenue [Line Items]
Revenue	18,354	19,070	23,707	23,782
Canada
Disaggregation of Revenue [Line Items]
Revenue	30,776	36,976	66,572	75,447
Australia
Disaggregation of Revenue [Line Items]
Revenue	57,030	56,585	121,901	122,802
All other countries
Disaggregation of Revenue [Line Items]
Revenue	8,252	7,627	14,585	14,644
Home and Building Products
Disaggregation of Revenue [Line Items]
Revenue	392,062	396,659	787,853	793,232
Home and Building Products | United States
Disaggregation of Revenue [Line Items]
Revenue	375,326	378,341	754,954	757,641
Home and Building Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	1	0	109	16
Home and Building Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	14,413	15,406	29,181	30,761
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	2,322	2,912	3,609	4,814
Home and Building Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	188,529	185,149	375,070	375,879
Home and Building Products | Commercial
Disaggregation of Revenue [Line Items]
Revenue	170,740	176,243	347,733	345,757
Home and Building Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	32,793	35,267	65,050	71,596
Consumer and Professional Products
Disaggregation of Revenue [Line Items]
Revenue	280,818	314,325	528,180	567,136
Consumer and Professional Products | United States
Disaggregation of Revenue [Line Items]
Revenue	183,142	212,385	334,314	366,052
Consumer and Professional Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	18,353	19,070	23,598	23,766
Consumer and Professional Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	16,363	21,570	37,391	44,686
Consumer and Professional Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	57,030	56,585	121,901	122,802
Consumer and Professional Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	5,930	4,715	10,976	9,830
Consumer and Professional Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	97,044	103,403	173,108	185,109
Consumer and Professional Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	13,676	11,698	27,681	24,185
Consumer and Professional Products | Retail
Disaggregation of Revenue [Line Items]
Revenue	73,511	97,903	142,789	166,400
Consumer and Professional Products | Industrial
Disaggregation of Revenue [Line Items]
Revenue	16,372	19,083	31,149	36,176
Consumer and Professional Products | International excluding North America
Disaggregation of Revenue [Line Items]
Revenue	$ 80,215	$ 82,238	$ 153,453	$ 155,266