Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 378,208	$ 381,680
Type of Revenue [Extensible List]	Net sales	Net sales
Costs of products sold	$ 341,994	$ 350,015
Type of Cost, Good or Service [Extensible List]	Net sales	Net sales
Gross profit	$ 36,214	$ 31,665
Selling, general and administrative expenses	30,745	33,166
Goodwill and other asset impairment charges	0	117,349
Gains on dispositions of plant, equipment and timberlands, net	(644)	(2,961)
Operating income (loss)	6,113	(115,889)
Non-operating income (expense)
Interest expense	(12,594)	(7,862)
Interest income	271	17
Other, net	(3,278)	(1,340)
Total non-operating expense	(15,601)	(9,185)
Loss from continuing operations before income taxes	(9,488)	(125,074)
Income tax provision (benefit)	3,694	(16,784)
Loss from continuing operations	(13,182)	(108,290)
Discontinued operations:
Loss before income taxes	(402)	(37)
Income tax provision	0	0
Loss from discontinued operations	(402)	(37)
Net loss	$ (13,584)	$ (108,327)
Basic earnings per share
Loss from continuing operations (in dollars per share)	$ (0.29)	$ (2.42)
Loss from discontinued operations (in dollars per share)	(0.01)	0
Basic loss per share (in dollars per share)	(0.30)	(2.42)
Diluted earnings per share
Loss from continuing operations (in dollars per share)	(0.29)	(2.42)
Loss from discontinued operations (in dollars per share)	(0.01)	0
Diluted loss per share (in dollars per share)	$ (0.30)	$ (2.42)
Weighted average shares outstanding
Basic (in shares)	44,957	44,709
Diluted (in shares)	44,957	44,709