Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues		$ 1,330,780	$ 1,337,435	$ 1,040,930
Costs and expenses:
Cost of goods sold		806,822	715,846	687,781
Selling, general and administrative expenses		76,506	73,432	72,519
CatchMark merger-related expenses		27,325	0	0
Environmental charge		5,550	0	0
Gain on fire damage		(34,505)	(3,361)	0
Total costs and expenses		881,698	785,917	760,300
Operating income		449,082	551,518	280,630
Interest expense, net	[1]	(27,400)	(29,275)	(29,463)
Pension settlement charge		(14,165)	0	(42,988)
Non-operating pension and other postretirement employee benefit costs		(8,138)	(13,227)	(14,226)
Other		(67)	(0)	(0)
Income before income taxes		399,312	509,016	193,953
Income taxes		(65,412)	(85,156)	(27,123)
Net income		$ 333,900	$ 423,860	$ 166,830
Net income per share:
Basic		$ 4.59	$ 6.29	$ 2.48
Diluted		4.58	6.26	2.47
Dividends per share		$ 2.72	$ 5.67	$ 1.61
Weighted-average shares outstanding (in thousands)
Basic		72,740	67,352	67,237
Diluted		72,922	67,719	67,568

[1] Includes amortization of bond discounts and deferred loan fees.