SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Segment Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
SALES	$ 291,431	$ 195,630	$ 482,878	$ 454,760
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
SALES	14,700	5,800	26,700	5,800
Real Estate
Segment Reporting Information [Line Items]
Threshold to be considered a large disposition transaction			20,000
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
SALES	36,000		36,000	116,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	(1,468)	(930)	(2,907)	(943)
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
SALES	49,294	46,767	100,971	99,749
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	35,323	26,171	76,844	57,245
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
SALES	80,559	41,769	138,138	79,308
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
SALES	18,646	7,524	33,585	7,524
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
SALES	74,531	50,009	85,035	168,573
Operating Segments | Trading
Segment Reporting Information [Line Items]
SALES	34,546	24,320	51,212	43,304
Intersegment Eliminations | Timber Funds
Segment Reporting Information [Line Items]
SALES	1,407	877	2,761	877
Intersegment Eliminations | Trading
Segment Reporting Information [Line Items]
SALES	61	53	146	66
Intersegment Eliminations | Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	$ (1,468)	$ (930)	$ (2,907)	$ (943)