SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Segment Reporting Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) a	Dec. 31, 2023 USD ($) a
Segment Reporting Information [Line Items]
Sales	$ 484,485	$ 987,929	$ 788,373
Costs and Expenses	(327,205)	(547,582)	(528,916)
OPERATING INCOME	83,336	364,107	184,696
Asset impairment charge	7,048	0	0
Reconciliation of reportable segment results to consolidated income before taxes
Costs related to the merger with PotlatchDeltic	(6,303)	0	0
Costs related to disposition initiatives	0	(849)	0
Asset impairment charge	(7,048)	0	0
Restructuring charges	(1,110)	(1,139)	0
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	74,594	339,838	159,607
Income tax (expense) benefit	(527)	1,022	(293)
INCOME FROM CONTINUING OPERATIONS	74,067	340,860	159,314
Income from operations of discontinued operations, net of tax	1,883	28,123	19,181
Gain on sale of discontinued operations	404,463	0	0
NET INCOME	480,413	368,983	178,495
Gain (loss) from net recovery and costs with legal settlement	(1,700)	8,000	20,700
Pension settlement charge	0	5,979	2,036
Separate Investment Accounts
Reconciliation of reportable segment results to consolidated income before taxes
Pension settlement charge		6,000	$ 2,000
Tax on settlement charge		1,200
Interest rate swaps | Derivatives Designated as Cash Flow Hedges | Designated as Hedging Instrument
Reconciliation of reportable segment results to consolidated income before taxes
Gain on derivative, net		$ 1,600
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Reconciliation of reportable segment results to consolidated income before taxes
Sale of land (in acres) | a		200,000	55,000
Sale of land consideration		$ 495,000	$ 242,200
Large Dispositions | Large Disposition Of Timberlands
Reconciliation of reportable segment results to consolidated income before taxes
Threshold for large dispositions		$ 20,000	20,000
Southeast Oklahoma | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Reconciliation of reportable segment results to consolidated income before taxes
Sale of land (in acres) | a		91,000
Washington | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Reconciliation of reportable segment results to consolidated income before taxes
Sale of land (in acres) | a		109,000
Southern Timber
Segment Reporting Information [Line Items]
Sales	228,309	$ 251,642	265,134
Pacific Northwest Timber
Segment Reporting Information [Line Items]
Sales	83,564	108,019	133,276
Real Estate
Segment Reporting Information [Line Items]
Sales	172,612	628,268	389,963
Real Estate | Large Dispositions | Large Disposition Of Timberlands
Segment Reporting Information [Line Items]
Sales		495,000	242,200
Depreciation, depletion and amortization		(156,000)	(91,100)
Non-Cash Cost of Land and Improved Development		(37,600)	(43,700)
Operating Segments
Segment Reporting Information [Line Items]
Sales	484,485	987,929	788,373
Depreciation, depletion and amortization	(104,773)	(268,018)	(225,983)
Non-Cash Cost of Land and Improved Development	(43,714)	(78,962)	(73,458)
Other costs and expenses	(121,488)	(133,218)	(136,508)
OPERATING INCOME	125,348	406,729	224,272
Asset impairment charge	7,048
Add: Depreciation, depletion and amortization	104,773	112,063	134,853
Non-cash cost of land and improved development from continuing operations	43,714	41,368	29,768
Reportable segment adjusted EBITDA	280,883	269,082	283,815
Reconciliation of reportable segment results to consolidated income before taxes
All other EBITDA	280,883	269,082	283,815
Depreciation, depletion and amortization	(104,773)	(112,063)	(134,853)
Non-cash cost of land and improved development	(43,714)	(41,368)	(29,768)
Asset impairment charge	(7,048)
Operating Segments | Large Dispositions | Large Disposition Of Timberlands
Segment Reporting Information [Line Items]
OPERATING INCOME		291,078	105,078
Operating Segments | Cut and haul costs
Segment Reporting Information [Line Items]
Costs and Expenses	(89,144)	(93,042)	(114,529)
Operating Segments | Port and freight costs
Segment Reporting Information [Line Items]
Costs and Expenses	(18)	(7,960)	(13,623)
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Sales	228,309	251,642	265,134
Depreciation, depletion and amortization	(68,998)	(73,409)	(79,974)
Non-Cash Cost of Land and Improved Development	0	0	0
Other costs and expenses	(44,821)	(46,406)	(45,968)
OPERATING INCOME	61,104	77,903	76,335
Asset impairment charge	0
Add: Depreciation, depletion and amortization	68,998	73,409	79,974
Non-cash cost of land and improved development from continuing operations	0	0	0
Reportable segment adjusted EBITDA	130,102	151,312	156,309
Reconciliation of reportable segment results to consolidated income before taxes
All other EBITDA	130,102	151,312	156,309
Depreciation, depletion and amortization	(68,998)	(73,409)	(79,974)
Non-cash cost of land and improved development	0	0	0
Asset impairment charge	0
Operating Segments | Southern Timber | Large Dispositions | Large Disposition Of Timberlands
Segment Reporting Information [Line Items]
OPERATING INCOME		0	0
Operating Segments | Southern Timber | Cut and haul costs
Segment Reporting Information [Line Items]
Costs and Expenses	(53,386)	(51,041)	(57,964)
Operating Segments | Southern Timber | Port and freight costs
Segment Reporting Information [Line Items]
Costs and Expenses	0	(2,883)	(4,893)
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Sales	83,564	108,019	133,276
Depreciation, depletion and amortization	(21,792)	(31,668)	(36,924)
Non-Cash Cost of Land and Improved Development	0	0	0
Other costs and expenses	(24,077)	(35,569)	(39,725)
OPERATING INCOME	1,919	(6,296)	(8,668)
Asset impairment charge	0
Add: Depreciation, depletion and amortization	21,792	31,668	36,924
Non-cash cost of land and improved development from continuing operations	0	0	0
Reportable segment adjusted EBITDA	23,711	25,372	28,256
Reconciliation of reportable segment results to consolidated income before taxes
All other EBITDA	23,711	25,372	28,256
Depreciation, depletion and amortization	(21,792)	(31,668)	(36,924)
Non-cash cost of land and improved development	0	0	0
Asset impairment charge	0
Operating Segments | Pacific Northwest Timber | Large Dispositions | Large Disposition Of Timberlands
Segment Reporting Information [Line Items]
OPERATING INCOME		0	0
Operating Segments | Pacific Northwest Timber | Cut and haul costs
Segment Reporting Information [Line Items]
Costs and Expenses	(35,758)	(42,001)	(56,565)
Operating Segments | Pacific Northwest Timber | Port and freight costs
Segment Reporting Information [Line Items]
Costs and Expenses	(18)	(5,077)	(8,730)
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Sales	172,612	628,268	389,963
Depreciation, depletion and amortization	(13,983)	(162,941)	(109,085)
Non-Cash Cost of Land and Improved Development	(43,714)	(78,962)	(73,458)
Other costs and expenses	(52,590)	(51,243)	(50,815)
OPERATING INCOME	62,325	335,122	156,605
Asset impairment charge	7,048
Add: Depreciation, depletion and amortization	13,983	6,986	17,955
Non-cash cost of land and improved development from continuing operations	43,714	41,368	29,768
Reportable segment adjusted EBITDA	127,070	92,398	99,250
Reconciliation of reportable segment results to consolidated income before taxes
All other EBITDA	127,070	92,398	99,250
Depreciation, depletion and amortization	(13,983)	(6,986)	(17,955)
Non-cash cost of land and improved development	(43,714)	(41,368)	(29,768)
Asset impairment charge	(7,048)
Operating Segments | Real Estate | Large Dispositions | Large Disposition Of Timberlands
Segment Reporting Information [Line Items]
OPERATING INCOME		291,078	105,078
Operating Segments | Real Estate | Cut and haul costs
Segment Reporting Information [Line Items]
Costs and Expenses	0	0	0
Operating Segments | Real Estate | Port and freight costs
Segment Reporting Information [Line Items]
Costs and Expenses	0	0	0
Corporate and other
Segment Reporting Information [Line Items]
Reportable segment adjusted EBITDA	(32,918)	(38,843)	(37,864)
Reconciliation of reportable segment results to consolidated income before taxes
All other EBITDA	(32,918)	(38,843)	(37,864)
Corporate And Reconciling Items
Segment Reporting Information [Line Items]
Depreciation, depletion and amortization	(106,454)
Asset impairment charge	7,048
Add: Depreciation, depletion and amortization		113,854	136,565
Non-cash cost of land and improved development from continuing operations	43,714	41,368	29,768
Less: Large Dispositions		(291,078)	(105,078)
Reconciliation of reportable segment results to consolidated income before taxes
Interest, net and miscellaneous expense	(2,057)	(25,544)	(43,367)
Depreciation, depletion and amortization		(113,854)	(136,565)
Non-cash cost of land and improved development	(43,714)	(41,368)	(29,768)
Non-operating expense	(6,685)	1,275	18,278
Costs related to the merger with PotlatchDeltic	(6,303)
Costs related to disposition initiatives		(849)
Asset impairment charge	(7,048)
Restructuring charges	$ (1,110)	(1,139)
Large Dispositions		$ 291,078	$ 105,078