DISCONTINUED OPERATIONS - Narrative (Details) $ in Thousands, $ in Thousands				3 Months Ended			6 Months Ended	9 Months Ended
	Jul. 31, 2026 USD ($)	Jul. 31, 2026 AUD ($)	Jun. 09, 2026 USD ($)	Jun. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jul. 31, 2026 AUD ($)	Sep. 30, 2025 USD ($)
Disposal Group, Including Discontinued Operations [Line Items]
Equity method investments				$ 118,600				$ 118,600			$ 0
Acquisition costs				3,658				8,945
Net tax provision (benefit)				7,742		$ 18,043		3,019	$ 27,971
Depreciation and amortization expense				6,581		6,013		18,820	17,842
Depreciation and amortization expense								29,857	28,754
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							$ 11,593
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							14,320
Depreciation and amortization expense				2,347		2,512		6,910	7,476
Discontinued Operations
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							19,867
Discontinued Operations | Personnel related costs
Disposal Group, Including Discontinued Operations [Line Items]
Payments for restructuring							6,046
Discontinued Operations | Intangible Asset Impairments
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							6,609
Discontinued Operations | Inventory Write-down
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							5,925
Global Sourcing Strategy Expansion | Discontinued Operations
Disposal Group, Including Discontinued Operations [Line Items]
Restructuring charges							25,913
Global Sourcing Strategy Expansion | Discontinued Operations | Fixed Asset Write-down Charges
Disposal Group, Including Discontinued Operations [Line Items]
Non-cash charges							$ 7,333
Discontinued Operations, Disposed of by Sale | AMES North America
Disposal Group, Including Discontinued Operations [Line Items]
Proceeds from organization of joint venture			$ 100,000
Notes issued			161,100
Equity method investments			$ 118,600	118,600				118,600
Impairment charges				3,955	$ 22,648
Loss on discontinued operation, before tax								26,603
Discontinued Operations, Disposed of by Sale | AMES’ U.S., Canada, Australia, and U.K
Disposal Group, Including Discontinued Operations [Line Items]
Net tax provision (benefit)				9,533	$ (13,625)			(4,092)
Discontinued Operations, Disposed of by Sale | Veritage Brands | AMES North America
Disposal Group, Including Discontinued Operations [Line Items]
Equity interest (as percent)			43.00%
Discontinued Operations, Disposed of by Sale | Veritage Brands | AMES North America | ONCAP Management Partners, L.P.
Disposal Group, Including Discontinued Operations [Line Items]
Equity interest (as percent)			57.00%
Discontinued Operations, Held-for-sale
Disposal Group, Including Discontinued Operations [Line Items]
Depreciation and amortization expense				0				8,574
Depreciation and amortization excluded				6,246				9,822
Depreciation if not discontinued				6,246				18,396
Depreciation and amortization expense						6,159			18,332
Amortization								5,762
Lease amortization excluded				4,444				7,375
Amortization if not discontinued				$ 4,444		$ 4,049		$ 13,137	$ 12,561
Discontinued Operations, Held-for-sale | AMES Australasia business | Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Proceeds from organization of joint venture	$ 180,910	$ 258,000
Notes issued	48,593	$ 69,300
Equity method investments	$ 20,896									$ 29,800
Discontinued Operations, Held-for-sale | Griffon Joint Venture | AMES Australasia business | Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Equity interest (as percent)	49.00%									49.00%
Discontinued Operations, Held-for-sale | Griffon Joint Venture | AMES Australasia business | Investment Group, including AMES Australasia Management | Subsequent Event
Disposal Group, Including Discontinued Operations [Line Items]
Equity interest (as percent)	51.00%									51.00%