OTHER EXPENSE, NET - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended			6 Months Ended
	Dec. 01, 2025	Feb. 10, 2025	Mar. 27, 2026	Dec. 26, 2025	Mar. 28, 2025	Mar. 27, 2026	Mar. 28, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of business			$ (25,664)		$ (281)	$ (25,664)	$ (349)
Disposal Group, Held-for-Sale, Not Discontinued Operations \| HDPE Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset held-for-sale, valuation allowance			$ 25,664			$ 25,664
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Tectron Tube
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of business	$ 2,415
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Operations In Russia
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of business				$ (140)
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Northwest Polymers
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of business		$ (6,101)