REVENUE - Disaggregation of Revenue by Product (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 1,108,445	$ 858,549	$ 711,556
Lease Revenue	1,152	605	0
Total Revenue	1,109,597	859,154	711,556
Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	160,328	143,291	143,163
Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	564,502	449,178	439,473
Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	4,671	2,430	5,259
Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	729,501	594,899	587,895
License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	19,531	18,932	19,348
Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	12,546	14,818	28,749
Agency Fee Income
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,399	1,160	677
Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	156,752
Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	190,228	34,910	48,774
Improved Development
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	51,713	14,498	5,882
Unimproved Development
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	37,500	8,426	19,476
Rural
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	43,088	67,152	47,647
Timberland & Non-Strategic
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	44	19,255	1,338
Conservation Easements
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,855	3,099
Deferred Revenue/Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	(3,532)	283	544
Large Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	56,048	116,027
Total Real Estate Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	188,716	228,740	74,887
Trading | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			114,606
Elim.
Disaggregation of Revenue [Line Items]
Total Revenue	(3,657)	(3,676)	(155)
Operating Segments | Southern Timber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	204,441	191,831	194,111
Total Revenue	204,441	191,831	194,111
Operating Segments | Southern Timber | Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	95,995	94,108	86,537
Operating Segments | Southern Timber | Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	79,154	73,683	67,360
Operating Segments | Southern Timber | Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	4,671	2,430	5,259
Operating Segments | Southern Timber | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	179,820	170,221	159,156
Operating Segments | Southern Timber | License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	18,116	17,765	18,270
Operating Segments | Southern Timber | Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	6,505	3,845	16,685
Operating Segments | Southern Timber | Agency Fee Income
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Operating Segments | Southern Timber | Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0
Operating Segments | Southern Timber | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	24,621	21,610	34,955
Operating Segments | Pacific Northwest Timber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	143,021	120,809	85,414
Total Revenue	143,021	120,809	85,414
Operating Segments | Pacific Northwest Timber | Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	9,336	10,581	10,350
Operating Segments | Pacific Northwest Timber | Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	127,768	106,051	72,377
Operating Segments | Pacific Northwest Timber | Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Operating Segments | Pacific Northwest Timber | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	137,104	116,632	82,727
Operating Segments | Pacific Northwest Timber | License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	990	843	717
Operating Segments | Pacific Northwest Timber | Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	4,927	3,334	1,970
Operating Segments | Pacific Northwest Timber | Agency Fee Income
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Operating Segments | Pacific Northwest Timber | Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0
Operating Segments | Pacific Northwest Timber | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	5,917	4,177	2,687
Operating Segments | New Zealand Timber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	281,158	202,315	241,861
Total Revenue	281,158	202,315	241,861
Operating Segments | New Zealand Timber | Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	42,836	27,558	32,925
Operating Segments | New Zealand Timber | Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	237,262	166,935	198,481
Operating Segments | New Zealand Timber | Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Operating Segments | New Zealand Timber | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	280,098	194,493	231,406
Operating Segments | New Zealand Timber | License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	385	307	361
Operating Segments | New Zealand Timber | Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	675	7,515	10,094
Operating Segments | New Zealand Timber | Agency Fee Income
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Operating Segments | New Zealand Timber | Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0
Operating Segments | New Zealand Timber | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,060	7,822	10,455
Operating Segments | Timber Funds
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	196,065	26,120
Total Revenue	199,402	29,557	0
Operating Segments | Timber Funds | Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	792	784
Operating Segments | Timber Funds | Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	38,042	25,195
Operating Segments | Timber Funds | Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0
Operating Segments | Timber Funds | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	38,834	25,979	0
Operating Segments | Timber Funds | License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	40	17
Operating Segments | Timber Funds | Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	439	124
Operating Segments | Timber Funds | Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	156,752
Operating Segments | Timber Funds | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	157,231	141
Operating Segments | Real Estate
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	188,716	228,740	74,887
Lease Revenue	1,152	605
Total Revenue	189,868	229,345	74,887
Operating Segments | Real Estate | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0
Operating Segments | Real Estate | Improved Development
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	51,713	14,498	5,882
Total Revenue	51,713	14,498	5,882
Operating Segments | Real Estate | Unimproved Development
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	37,500	8,426	19,476
Total Revenue	37,500	8,426	19,476
Operating Segments | Real Estate | Rural
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	43,088	67,152	47,647
Total Revenue	43,088	67,152	47,647
Operating Segments | Real Estate | Timberland & Non-Strategic
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	44	19,255	1,338
Operating Segments | Real Estate | Conservation Easements
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,855	3,099
Total Revenue	3,855	3,099	0
Operating Segments | Real Estate | Deferred Revenue/Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	(3,532)	283	544
Total Revenue	(2,380)	888	544
Operating Segments | Real Estate | Large Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	56,048	116,027
Operating Segments | Real Estate | Total Real Estate Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	188,716	228,740	74,887
Operating Segments | Trading
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	95,044	88,734	115,283
Total Revenue	95,364	88,973	115,438
Operating Segments | Trading | Pulpwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	11,369	10,260	13,351
Operating Segments | Trading | Sawtimber
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	82,276	77,314	101,255
Operating Segments | Trading | Hardwood
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Operating Segments | Trading | Total Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	93,645	87,574	114,606
Operating Segments | Trading | License Revenue, Primarily from Hunting
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0		0
Operating Segments | Trading | Other Non-Timber/Carbon Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0		0
Operating Segments | Trading | Agency Fee Income
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,399	1,160	677
Operating Segments | Trading | Fund II Timberland Dispositions
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0
Operating Segments | Trading | Total Non-Timber Sales
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,399	1,160	677
Intersegment Eliminations | Timber Funds
Disaggregation of Revenue [Line Items]
Total Revenue	3,337	3,437
Intersegment Eliminations | Trading
Disaggregation of Revenue [Line Items]
Total Revenue	320	239	155
Intersegment Eliminations | Elim.
Disaggregation of Revenue [Line Items]
Total Revenue	$ (3,657)	$ (3,676)	$ (155)