Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues		$ 246,101	$ 359,597	$ 504,063	$ 770,947
Costs and expenses:
Cost of goods sold		215,063	191,334	439,413	371,181
Selling, general and administrative expenses		17,585	20,412	35,815	36,706
CatchMark merger-related expenses		244	0	2,453	0
Gain on fire damage		(23,110)	(9,868)	(23,110)	(9,592)
Total costs and expenses		209,782	201,878	454,571	398,295
Operating income		36,319	157,719	49,492	372,652
Interest expense, net	[1]	(7,613)	(7,419)	(7,812)	(10,313)
Pension settlement charge		0	0	0	(14,165)
Non-operating pension and other postretirement employee benefit costs		(229)	(1,809)	(457)	(3,738)
Other		258	0	268	0
Income before income taxes		28,735	148,491	41,491	344,436
Income taxes		(6,429)	(28,269)	(2,925)	(60,334)
Net income		$ 22,306	$ 120,222	$ 38,566	$ 284,102
Net income per share:
Basic		$ 0.28	$ 1.73	$ 0.48	$ 4.09
Diluted		0.28	1.72	0.48	4.07
Dividends per share		$ 0.45	$ 0.44	$ 0.9	$ 0.88
Weighted-average shares outstanding
Basic		80,145	69,580	80,087	69,502
Diluted		80,416	69,791	80,297	69,731

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