Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Net sales	$ 363,963	$ 244,911	$ 745,643	$ 470,585
Type of Revenue [Extensible List]	Net sales	Net sales	Net sales	Net sales
Costs of products sold	$ 326,566	$ 209,357	$ 676,581	$ 395,735
Type of Cost, Good or Service [Extensible List]	Net sales	Net sales	Net sales	Net sales
Gross profit	$ 37,397	$ 35,554	$ 69,062	$ 74,850
Selling, general and administrative expenses	28,400	28,984	61,566	51,811
Goodwill and other asset impairment charges	0	0	117,349	0
Loss (gains) on dispositions of plant, equipment and timberlands, net	73	(1,553)	(2,888)	(2,403)
Operating income (loss)	8,924	8,123	(106,965)	25,442
Non-operating income (expense)
Interest expense	(7,672)	(1,772)	(15,534)	(3,303)
Interest income	38	11	55	31
Other, net	(455)	(849)	(1,795)	(1,073)
Total non-operating expense	(8,089)	(2,610)	(17,274)	(4,345)
Income (loss) from continuing operations before income taxes	835	5,513	(124,239)	21,097
Income tax provision (benefit)	3,295	4,021	(13,489)	11,211
Income (loss) from continuing operations	(2,460)	1,492	(110,750)	9,886
Discontinued operations:
Income (loss) before income taxes	408	(82)	371	(82)
Income tax provision	0	0	0	0
Loss from discontinued operations	408	(82)	371	(82)
Net income (loss)	$ (2,052)	$ 1,410	$ (110,379)	$ 9,804
Basic earnings per share
Income (loss) from continuing operations (in dollars per share)	$ (0.05)	$ 0.03	$ (2.47)	$ 0.22
Income from discontinued operations (in dollars per share)	0.01	0	0.01	0
Basic earnings (loss) per share (in dollars per share)	(0.04)	0.03	(2.46)	0.22
Diluted earnings per share
Income (loss) from continuing operations (in dollars per share)	(0.05)	0.03	(2.47)	0.22
Income from discontinued operations (in dollars per share)	0.01	0	0.01	0
Diluted earnings (loss) per share (in dollars per share)	$ (0.04)	$ 0.03	$ (2.46)	$ 0.22
Weighted average shares outstanding
Basic (in shares)	44,841	44,563	44,775	44,507
Diluted (in shares)	44,841	44,872	44,775	44,865