REPORTABLE SEGMENTS - Schedule of Disaggregated Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Revenue	$ 649,088	$ 632,371
Home and Building Products
Segment Reporting Information [Line Items]
Revenue	408,004	395,401
Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	241,084	236,970
United States
Segment Reporting Information [Line Items]
Revenue	515,317	507,081
United States | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	392,792	378,258
United States | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	122,525	128,823
Europe
Segment Reporting Information [Line Items]
Revenue	4,161	4,540
Europe | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	0	0
Europe | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	4,161	4,540
Canada
Segment Reporting Information [Line Items]
Revenue	32,760	30,120
Canada | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	11,430	14,116
Canada | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	21,330	16,004
Australia
Segment Reporting Information [Line Items]
Revenue	89,826	83,131
Australia | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	0	0
Australia | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	89,826	83,131
All other countries
Segment Reporting Information [Line Items]
Revenue	7,024	7,499
All other countries | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	3,782	3,027
All other countries | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	$ 3,242	$ 4,472