SEGMENT AND GEOGRAPHICAL INFORMATION - Operating Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
OPERATING INCOME	$ 211,284	$ 165,822	$ 269,775
Unallocated interest expense and other	(27,667)	(33,642)	(44,627)
Total Income before Income Taxes	183,617	132,180	225,148
Gain from net recovery with legal settlement	20,700
Separate Investment Accounts
Segment Reporting Information [Line Items]
Settlement expense	2,036	0	0
Fund II Timberland Dispositions
Segment Reporting Information [Line Items]
Gain on sale of properties	0	0	51,522
Pacific Northwest Timber
Segment Reporting Information [Line Items]
Timber write-offs from casualty events		700
New Zealand Timber
Segment Reporting Information [Line Items]
Timber write-offs from casualty events	2,300
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
OPERATING INCOME			45,600
Timber Funds, Portion Attributable To Noncontrolling Interests | Large Dispositions | Fund II Timberland Dispositions
Segment Reporting Information [Line Items]
Gain on sale of properties			41,200
Timber Funds, Portion Attributable To Parent | Large Dispositions
Segment Reporting Information [Line Items]
Gain on sale of properties			7,500
Timber Funds, Portion Attributable To Parent | Large Dispositions | Fund II Timberland Dispositions
Segment Reporting Information [Line Items]
Gain on sale of properties			10,300
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
OPERATING INCOME	105,100	16,600	44,800
Real Estate | Large Dispositions | Multi-Family Apartment Complex Sale
Segment Reporting Information [Line Items]
Gain on sale of properties		11,500
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
OPERATING INCOME	76,256	96,616	66,111
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
OPERATING INCOME	(8,998)	15,192	6,827
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
OPERATING INCOME	26,045	30,621	51,513
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
OPERATING INCOME	0	0	63,219
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
OPERATING INCOME	156,605	58,495	112,540
Operating Segments | Trading
Segment Reporting Information [Line Items]
OPERATING INCOME	492	382	144
Corporate and other
Segment Reporting Information [Line Items]
OPERATING INCOME	$ (39,116)	$ (35,484)	$ (30,579)