Segment Information (Summary of Information by Business Segment) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Adjusted EBITDDA		$ 200,234	$ 574,155	$ 652,871
Interest expense, net	[1]	(24,218)	(27,400)	(29,275)
Depreciation, depletion and amortization		(119,518)	(96,700)	(75,633)
Basis of real estate sold		(31,392)	(29,921)	(27,360)
Environmental charge		0	(5,550)	0
CatchMark merger-related expenses		(2,453)	(27,325)	0
Gain on fire damage		39,436	34,505	3,361
Pension settlement charge		0	(14,165)	0
Non-operating pension and other postretirement employee benefits		(914)	(8,138)	(13,227)
Loss on fixed assets		(557)	(82)	(1,721)
Other		1,267	(67)	0
Income before income taxes		61,885	399,312	509,016
Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization		119,518	96,700	75,633
Operating Segments [Member] | Timberlands [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		151,321	249,373	262,944
Depreciation, depletion and amortization		75,009	59,532	45,403
Operating Segments [Member] | Wood Products [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		20,487	290,907	393,858
Depreciation, depletion and amortization		43,506	35,953	28,802
Operating Segments [Member] | Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		67,775	73,258	47,457
Depreciation, depletion and amortization		526	695	640
Basis of real estate sold		(31,431)	(29,932)	(27,381)
Corporate [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		(45,406)	(49,314)	(47,393)
Depreciation, depletion and amortization		477	520	788
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDDA		6,057	9,931	(3,995)
Basis of real estate sold		$ 39	$ 11	$ 21

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