LONG-TERM DEBT - Narrative (Details) $ in Thousands		1 Months Ended			3 Months Ended	12 Months Ended
	Jan. 24, 2022 USD ($)	Jul. 31, 2018 GBP (£)	Jul. 31, 2016 AUD ($)	Nov. 30, 2012 USD ($)	Sep. 30, 2022 USD ($) lease step_down	Sep. 30, 2022 USD ($) lease option step_down	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2022 CAD ($) lease step_down	Sep. 30, 2022 AUD ($) lease step_down	Sep. 30, 2022 GBP (£) lease step_down	Dec. 09, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 30, 2020 USD ($)	Jan. 29, 2020 USD ($)	Nov. 30, 2012 CAD ($)
Debt Instrument [Line Items]
Minimum payments under debt agreements for 2023					$ 12,653,000	$ 12,653,000
Minimum payments under debt agreements for 2024					12,267,000	12,267,000
Minimum payments under debt agreements for 2025					109,522,000	109,522,000
Minimum payments under debt agreements for 2026					12,261,000	12,261,000
Minimum payments under debt agreements for 2027					12,324,000	12,324,000
Minimum payments under debt agreements thereafter					1,436,533,000	1,436,533,000
Capitalized fees & expenses					$ 21,031,000	21,031,000	$ 15,138,000
Gain (loss) from debt extinguishment						$ (4,529,000)	0	$ (7,925,000)
Repurchase of debt instrument, discount rate					91.82%	91.82%			91.82%	91.82%	91.82%
Long-term debt, gross					$ 1,595,560,000	$ 1,595,560,000	1,060,506,000
Number of interest rate step-downs | step_down					2	2			2	2	2
Debt instrument, basis spread on variable rate				1.30%
Outstanding debt					$ 1,573,651,000	$ 1,573,651,000	1,045,683,000
Line of credit facility, amount outstanding									$ 0
Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000													$ 400,000,000	$ 350,000,000
Line of credit facility, maximum borrowing capacity, accordion feature												$ 100,000,000
Maximum percentage of equity interest of subsidiaries borrowings guaranteed						65.00%
Letters of credit outstanding, amount					12,287,000	$ 12,287,000
Line of credit facility, remaining borrowing capacity					290,385,000	$ 290,385,000
Term Loan | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Debt instrument, face amount			$ 18,375,000
Debt instrument, balloon payment			9,625,000
Term Loan | Ames UK
Debt Instrument [Line Items]
Debt instrument, face amount | £		£ 14,000,000
Debt instrument, balloon payment | £		7,088,000
Debt instrument, periodic payment, principal | £		438,000
Revolving Credit Facility | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Maximum borrowing capacity			20,000,000
Revolving Credit Facility | Ames UK
Debt Instrument [Line Items]
Debt instrument, face amount | £		£ 5,000,000
Debt instrument, basis spread on variable rate		3.25%				5.50%
Term and Mortgage Loan July 2018 | Ames UK
Debt Instrument [Line Items]
Outstanding debt					12,090,000	$ 12,090,000					£ 11,060,000
Letter of Credit Subfacility | Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity												100,000,000
Multicurrency Subfacility | Revolver due 2025
Debt Instrument [Line Items]
Maximum borrowing capacity												$ 200,000,000
Receivables Purchase Facility | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Debt instrument, face amount			$ 15,000,000
Line of credit facility, remaining borrowing capacity					$ 9,722,000	$ 9,722,000				$ 15,000,000
Debt instrument, interest rate at period end					3.96%	3.96%			3.96%	3.96%	3.96%
Senior Notes | Senior Notes due 2028
Debt Instrument [Line Items]
Debt instrument, face amount								$ 1,000,000,000
Stated percentage								5.75%
Capitalized fees & expenses					$ 16,448,000	$ 16,448,000
Senior Notes | Senior notes due 2022
Debt Instrument [Line Items]
Debt instrument, face amount								$ 1,000,000,000
Stated percentage								5.25%
Gain (loss) from debt extinguishment						(7,925,000)
Write off of deferred debt issuance cost						6,725,000
Tender offer net premium expense						607,000
Redemption interest expense						593,000
Senior Notes due 2028
Debt Instrument [Line Items]
Debt instrument, face amount													$ 1,000,000,000
Stated percentage													5.75%
Capitalized fees & expenses					10,939,000	10,939,000	13,293,000
Write off of deferred debt issuance cost						297,000
Debt instrument, repurchased face amount					25,225,000	25,225,000
Debt instrument, repurchase amount					23,161,000	23,161,000
Gain (loss) on repurchase of debt instrument						1,767,000
Gain (loss) on extinguishment of debt, before write off of debt issuance cost						2,064,000
Long-term debt, gross					974,775,000	974,775,000	1,000,000,000
Outstanding debt					$ 964,102,000	$ 964,102,000	$ 987,022,000
Debt instrument, interest rate at period end					5.75%	5.75%	5.75%		5.75%	5.75%	5.75%
Senior Notes due 2028 | Fair Value, Inputs, Level 1
Debt Instrument [Line Items]
Long-term debt, fair value					$ 833,433,000	$ 833,433,000
Revolver due 2025
Debt Instrument [Line Items]
Capitalized fees & expenses					1,227,000	1,227,000	$ 1,718,000
Long-term debt, gross					97,328,000	97,328,000	13,483,000
Outstanding debt					96,101,000	96,101,000	11,765,000
Finance lease - real estate
Debt Instrument [Line Items]
Capitalized fees & expenses					0	0	4,000
Long-term debt, gross					13,091,000	13,091,000	14,594,000
Outstanding debt					13,091,000	13,091,000	14,590,000
Non U.S. lines of credit
Debt Instrument [Line Items]
Capitalized fees & expenses					2,000	2,000	17,000
Long-term debt, gross					0	0	3,012,000
Maximum borrowing capacity				$ 10,956,000												$ 15,000
Line of credit facility, remaining borrowing capacity					10,956,000	10,956,000			$ 15,000
Outstanding debt					$ (2,000)	$ (2,000)	$ 2,995,000
Non U.S. lines of credit | LIBOR Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end					4.44%	4.44%			4.44%	4.44%	4.44%
Non U.S. lines of credit | Bankers Acceptance Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate at period end					4.76%	4.76%			4.76%	4.76%	4.76%
Term Loan | Term Loan B due 2029
Debt Instrument [Line Items]
Debt instrument, face amount	$ 800,000,000
Gain (loss) from debt extinguishment					$ (6,296,000)
S0FR floor rate	0.00005%
Issuance price, percentage	0.00998%
Debt issuance costs, gross	$ 15,466,000
Extinguishment of debt, amount					300,000,000
Write off of deferred debt issuance cost, underwriting and other fees					5,575,000
Write off of deferred debt issuance cost, original issuer discount					721,000
Debt issuance costs, net					8,823,000	$ 8,823,000
Debt instrument, periodic payment, principal					2,000,000
Mortgages | Ames UK
Debt Instrument [Line Items]
Debt instrument, face amount | £		£ 4,000,000
Debt instrument, balloon payment | £		2,349,000
Debt instrument, periodic payment, principal | £		£ 105,000
Term Loan B due 2029
Debt Instrument [Line Items]
Capitalized fees & expenses					8,823,000	8,823,000
Long-term debt, gross					496,000,000	496,000,000
Outstanding debt					486,033,000	486,033,000
Term Loan B due 2029 | Fair Value, Inputs, Level 1
Debt Instrument [Line Items]
Debt instrument, fair value disclosure					476,160,000	$ 476,160,000
Secured Overnight Financing Rate | Revolver due 2025
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate						1.50%
Secured Overnight Financing Rate | Term Loan | Term Loan B due 2029
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00025%
Base Rate | Revolver due 2025
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate						0.50%
Sterling Overnight Index Average | Revolver due 2025
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate						1.50%
Bank Bill Swap Bid Rate | Revolving Credit Facility | Northcote Holdings Pty. Ltd
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			1.25%
London Interbank Offered Rate (LIBOR) | Mortgages | Ames UK
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.80%
London Interbank Offered Rate (LIBOR) | Mortgages | Ames UK
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate						3.99%
Troy, Ohio
Debt Instrument [Line Items]
Finance lease, buyout amount					$ 1	$ 1
Troy, Ohio | Finance lease - real estate
Debt Instrument [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate					5.00%	5.00%			5.00%	5.00%	5.00%
Ocala, Florida | Finance lease - real estate
Debt Instrument [Line Items]
Number of finance leases outstanding | lease					1	1			1	1	1
Long-term debt, percentage bearing fixed interest, percentage rate					5.60%	5.60%			5.60%	5.60%	5.60%
Number of option to extend | option						2
Finance lease, renewal term					5 years	5 years			5 years	5 years	5 years