Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues		$ 257,962	$ 411,350
Costs and expenses:
Cost of goods sold		224,350	179,847
Selling, general and administrative expenses		18,230	16,294
CatchMark merger-related expenses		2,209	0
Loss on fire damage		0	276
Total costs and expenses		244,789	196,417
Operating income		13,173	214,933
Interest expense, net	[1]	(199)	(2,894)
Pension settlement charge		0	(14,165)
Non-operating pension and other postretirement employee benefit costs		(228)	(1,929)
Other		10	0
Income before income taxes		12,756	195,945
Income taxes		3,504	(32,065)
Net income		$ 16,260	$ 163,880
Net income per share:
Basic		$ 0.20	$ 2.36
Diluted		0.20	2.35
Dividends per share		$ 0.45	$ 0.44
Weighted-average shares outstanding
Basic		80,027	69,419
Diluted		80,167	69,623

[1] Bond discounts and deferred loan fees are reported within interest expense, net on the Condensed Consolidated Statements of Operations.