SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Segment Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
SALES	$ 364,726	$ 198,875	$ 847,604	$ 653,635
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
SALES	75,400	7,700	102,100	13,500
Timber Funds, Portion Attributable To Noncontrolling Interests | Fund II Timberland Dispositions | Disposal Group, Not Discontinued Operations
Segment Reporting Information [Line Items]
SALES	69,700		69,700
Timber Funds, Portion Attributable To Parent | Fund II Timberland Dispositions | Disposal Group, Not Discontinued Operations
Segment Reporting Information [Line Items]
SALES	17,400		17,400
Real Estate
Segment Reporting Information [Line Items]
Threshold to be considered a large disposition transaction			20,000
Real Estate | Disposal Group, Not Discontinued Operations
Segment Reporting Information [Line Items]
SALES	20,000		56,000	116,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	(590)	(1,366)	(3,496)	(2,310)
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
SALES	44,818	47,653	145,789	147,402
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	31,513	28,885	108,357	86,131
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
SALES	75,558	62,804	213,696	142,112
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
SALES	94,469	9,907	128,054	17,431
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
SALES	93,375	28,791	178,409	197,364
Operating Segments | Trading
Segment Reporting Information [Line Items]
SALES	25,583	22,201	76,795	65,505
Intersegment Eliminations | Timber Funds
Segment Reporting Information [Line Items]
SALES	499	1,274	3,259	2,152
Intersegment Eliminations | Trading
Segment Reporting Information [Line Items]
SALES	91	92	237	158
Intersegment Eliminations | Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	$ (590)	$ (1,366)	$ (3,496)	$ (2,310)