Consolidated Statements of Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 1,385,516	$ 1,491,326	$ 1,084,694
Costs of products sold	1,255,809	1,342,524	939,899
Gross profit	129,707	148,802	144,795
Selling, general and administrative expenses	109,741	125,001	121,250
Goodwill and other asset impairment charges	0	190,556	0
Loss on sale of Ober-Schmitten and other non-strategic operation	18,365	0	0
Gains on dispositions of plant, equipment and timberlands, net	(1,111)	(2,804)	(5,069)
Operating income (loss)	2,712	(163,951)	28,614
Non-operating income (expense)
Interest expense	(64,739)	(33,207)	(12,353)
Interest income	1,486	408	73
Other, net	(10,551)	(7,642)	(2,657)
Total non-operating expense	(73,804)	(40,441)	(14,937)
Income (loss) before income taxes	(71,092)	(204,392)	13,677
Income tax provision (benefit)	7,011	(10,275)	6,956
Income (loss) from continuing operations	(78,103)	(194,117)	6,721
Discontinued operations:
Income (loss) before income taxes	(950)	(91)	216
Income tax provision	0	0	0
Income (loss) from discontinued operations	(950)	(91)	216
Net income (loss)	$ (79,053)	$ (194,208)	$ 6,937
Basic earnings (loss) per share
Income (loss) from continuing operations (in dollars per share)	$ (1.73)	$ (4.33)	$ 0.15
Loss from discontinued operations (in dollars per share)	(0.02)	0	0
Basic earnings per share (in dollars per share)	(1.75)	(4.33)	0.15
Diluted earnings (loss) per share
Income (loss) from continuing operations (in dollars per share)	(1.73)	(4.33)	0.15
Loss from discontinued operations (in dollars per share)	(0.02)	0	0
Diluted earnings per share (in dollars per share)	$ (1.75)	$ (4.33)	$ 0.15
Weighted average shares outstanding
Basic (in shares)	45,058	44,828	44,551
Diluted (in shares)	45,058	44,828	44,924