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REPORTABLE SEGMENTS - Schedule of disaggregated revenue by geographic region (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 2,270,626	$ 2,066,546	$ 1,874,248
Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	1,229,518	1,139,233	1,000,608
Home and Building Products
Segment Reporting Information [Line Items]
Revenue	1,041,108	927,313	873,640
United States
Segment Reporting Information [Line Items]
Revenue	1,753,075	1,646,215	1,511,168
United States | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	766,150	769,100	690,772
United States | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	986,925	877,115	820,396
Europe
Segment Reporting Information [Line Items]
Revenue	123,679	85,469	63,393
Europe | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	123,607	85,339	63,284
Europe | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	72	130	109
Canada
Segment Reporting Information [Line Items]
Revenue	130,337	112,734	111,799
Canada | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	85,676	74,072	72,327
Canada | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	44,661	38,662	39,472
Australia
Segment Reporting Information [Line Items]
Revenue	244,674	203,012	165,307
Australia | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	244,674	203,012	165,291
Australia | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	0	0	16
Total Revenue
Segment Reporting Information [Line Items]
Revenue	18,861	19,116	22,581
Total Revenue | Consumer and Professional Products
Segment Reporting Information [Line Items]
Revenue	9,411	7,710	8,934
Total Revenue | Home and Building Products
Segment Reporting Information [Line Items]
Revenue	$ 9,450	$ 11,406	$ 13,647

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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+ References

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