Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 423,860	$ 166,830	$ 55,661
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	77,425	77,885	72,105
Basis of real estate sold	27,360	25,348	20,554
Gain on sale of facility			(9,176)
Loss on extinguishment of debt			5,512
Change in deferred taxes	25	(14,610)	(11,045)
Pension and other postretirement employee benefits	22,079	23,666	11,877
Pension settlement charge		42,988
Equity-based compensation expense	8,607	8,063	7,272
Net gain on fire damage	(3,361)
Other, net	363	(1,269)	(2,324)
Change in working capital and operating-related activities
Receivables, net	(4,404)	(12,439)	7,238
Inventories, net	(10,333)	3,745	(3,519)
Other assets	7,331	4,591	5,305
Accounts payable and accrued liabilities	(17,626)	25,848	(11,415)
Other liabilities	(8,167)	1,327	3,955
Real estate development expenditures	(9,229)	(6,706)	(7,254)
Funding of pension and other postretirement employee benefits	(9,044)	(10,004)	(5,678)
Net cash from operating activities	504,886	335,263	139,068
CASH FLOWS FROM INVESTING ACTIVITIES
Property, plant and equipment additions	(38,947)	(22,693)	(39,153)
Timberlands reforestation and roads	(16,401)	(16,234)	(17,695)
Acquisition of timber and timberlands	(20,066)	(6,858)	(626)
Proceeds on sale of facility		1,000	58,793
Proceeds from property insurance	15,000
Other, net	1,269	2,593	3,198
Net cash from investing activities	(59,145)	(42,192)	4,517
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends to common stockholders	(388,241)	(107,853)	(107,722)
Repurchase of common stock		(15,364)	(25,173)
Proceeds from issuance of long-term debt	40,000	46,000	190,000
Repayment of long-term debt	(46,366)	(46,000)	(190,000)
Premiums and fees on debt retirement			(4,865)
Other, net	(6,702)	(1,768)	(1,012)
Net cash from financing activities	(401,309)	(124,985)	(138,772)
Change in cash, cash equivalents and restricted cash	44,432	168,086	4,813
Cash, cash equivalents and restricted cash at beginning of period	252,340	84,254	79,441
Cash, cash equivalents and restricted cash at end of period	$ 296,772	$ 252,340	$ 84,254