BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 647,814	$ 683,430	$ 1,963,847	$ 2,043,798
United States
Disaggregation of Revenue [Line Items]
Revenue	539,132	577,427	1,628,400	1,701,120
Europe
Disaggregation of Revenue [Line Items]
Revenue	19,345	19,792	43,052	43,574
Canada
Disaggregation of Revenue [Line Items]
Revenue	27,739	29,531	94,311	104,978
Australia
Disaggregation of Revenue [Line Items]
Revenue	52,706	49,548	174,607	172,350
All other countries
Disaggregation of Revenue [Line Items]
Revenue	8,892	7,132	23,477	21,776
Home and Building Products
Disaggregation of Revenue [Line Items]
Revenue	394,214	401,142	1,182,067	1,194,374
Home and Building Products | United States
Disaggregation of Revenue [Line Items]
Revenue	376,616	382,295	1,131,570	1,139,936
Home and Building Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	3	0	112	16
Home and Building Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	14,741	16,576	43,922	47,337
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	2,854	2,271	6,463	7,085
Home and Building Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	190,874	186,554	565,944	562,433
Home and Building Products | Commercial
Disaggregation of Revenue [Line Items]
Revenue	170,236	179,054	517,969	524,811
Home and Building Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	33,104	35,534	98,154	107,130
Consumer and Professional Products
Disaggregation of Revenue [Line Items]
Revenue	253,600	282,288	781,780	849,424
Consumer and Professional Products | United States
Disaggregation of Revenue [Line Items]
Revenue	162,516	195,132	496,830	561,184
Consumer and Professional Products | Europe
Disaggregation of Revenue [Line Items]
Revenue	19,342	19,792	42,940	43,558
Consumer and Professional Products | Canada
Disaggregation of Revenue [Line Items]
Revenue	12,998	12,955	50,389	57,641
Consumer and Professional Products | Australia
Disaggregation of Revenue [Line Items]
Revenue	52,706	49,548	174,607	172,350
Consumer and Professional Products | All other countries
Disaggregation of Revenue [Line Items]
Revenue	6,038	4,861	17,014	14,691
Consumer and Professional Products | Residential repair and remodel
Disaggregation of Revenue [Line Items]
Revenue	92,312	107,276	265,420	292,385
Consumer and Professional Products | Residential new construction
Disaggregation of Revenue [Line Items]
Revenue	14,998	12,600	42,679	36,785
Consumer and Professional Products | Retail
Disaggregation of Revenue [Line Items]
Revenue	49,978	63,560	192,767	229,960
Consumer and Professional Products | Industrial
Disaggregation of Revenue [Line Items]
Revenue	19,534	22,204	50,683	58,380
Consumer and Professional Products | International excluding North America
Disaggregation of Revenue [Line Items]
Revenue	$ 76,778	$ 76,648	$ 230,231	$ 231,914