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Basis of Presentation (Details) $ in Thousands	3 Months Ended		12 Months Ended	36 Months Ended
	Mar. 30, 2024 USD ($)	Apr. 01, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	May 06, 2024 USD ($)	Apr. 29, 2024 USD ($) employee
Subsequent Event [Line Items]
Operating income (loss)	$ 17,075	$ 16,594
Duties receivable	$ 40,000
Temiscaming High Purity Cellulose Plant
Subsequent Event [Line Items]
Average annual maintenance capital expenditures				$ 15,000
Operating income (loss)			$ (60,000)
Asset impairment charge			25,000
Working capital			$ 31,000	$ 31,000
Subsequent Event | Disposal Group, Disposed of by Sale | Lumber and Newsprint Facilities
Subsequent Event [Line Items]
Consideration receivable					$ 39,000
Subsequent Event | Temiscaming High Purity Cellulose Plant
Subsequent Event [Line Items]
Number of employees layoffs expected | employee						275
One-time operating charges expected in current year						$ 30,000

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