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Discontinued Operations - Narrative (Details) $ in Thousands, shares in Millions, $ in Millions	1 Months Ended			3 Months Ended		12 Months Ended			60 Months Ended
	Jun. 29, 2024 USD ($)	Aug. 31, 2021 USD ($) shares	Aug. 31, 2021 CAD ($) shares	Jun. 29, 2024 USD ($)	Jul. 01, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax income from CEWS benefit claims				$ 15,000
Gain on GreenFirst equity securities						$ 0	$ 0	$ 5,197
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax income from CEWS benefit claims				5,000
Discontinued Operations, Disposed of by Sale | Lumber and Newsprint Facilities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross purchase price	$ 39,000	$ 232,000		$ 39,000
Proceeds from sale of business		$ 193,000
Equity interests to be received (in shares) | shares		28.7	28.7
Equity interests to be received		$ 42,000
Credit note to be issued, receivable		$ 5,000	$ 8
Credit note to be issued, term which can be offset against amounts owed		5 years	5 years
Supply term		20 years	20 years
Rights to duty refunds									$ 112,000
Duties receivable							40,000
Pre tax gain (loss)							2,000	16,000
Loss on sale of duty refund rights	$ 1,000					890	0	0
Pre-tax (gain) loss on settlement of a claim						$ (5,267)	$ (424)	(16,808)
Discontinued Operations, Disposed of by Sale | Lumber and Newsprint Facilities | GreenFirst
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of common shares								$ 43,000
Discontinued Operations, Disposed of by Sale | Lumber and Newsprint Facilities | Representations And Warranties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax (gain) loss on settlement of a claim					$ 2,000

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