Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 16,260	$ 163,880
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization		32,173	19,874
Basis of real estate sold		10,631	10,854
Change in deferred taxes		394	(2,123)
Pension and other postretirement employee benefits		1,611	3,857
Pension settlement charge		0	14,165
Equity-based compensation expense		2,279	2,056
Loss on fire damage		0	276
Other, net		(3,509)	(291)
Change in working capital and operating-related activities, net		(17,205)	(21,208)
Real estate development expenditures		(2,408)	(2,161)
Funding of pension and other postretirement employee benefits		(1,087)	(1,296)
Net cash from operating activities		39,139	230,299
CASH FLOWS FROM INVESTING ACTIVITIES
Property, plant and equipment additions		(4,255)	(12,566)
Timberlands reforestation and roads		(6,118)	(4,648)
Interest received under swaps with other-than-insignificant financing element		5,055	0
Other, net		422	92
Net cash from investing activities		(4,896)	(17,122)
CASH FLOWS FROM FINANCING ACTIVITIES
Distributions to common stockholders		(35,962)	(30,524)
Repayments of long term debt		0	(3,000)
Other, net		(838)	(1,071)
Net cash from financing activities		(36,800)	(34,595)
Change in cash, cash equivalents and restricted cash		(2,557)	178,582
Cash, cash equivalents and restricted cash at beginning of period		345,591	296,772
Cash, cash equivalents and restricted cash at end of period		343,034	475,354
NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued property, plant and equipment additions		1,835	1,516
Accrued timberlands reforestation and roads		1,041	98
Cash and cash equivalents		325,632	470,918
Restricted cash included in other long-term assets	[1]	$ 17,402	$ 4,436
Restricted Cash, Asset, Statement of Financial Position [Extensible List]		Other long-term assets	Other long-term assets
Total cash, cash equivalents, and restricted cash		$ 343,034	$ 475,354

[1] 1 Amounts included in restricted cash represent proceeds held by a qualified intermediary that were or are intended to be reinvested in timber and timberlands. At March 31, 2023 and 2022, $14.0 million and $0, respectively, was classified in Other current assets.