SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Segment Sales) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
SALES	$ 198,875	$ 156,417	$ 653,635	$ 532,764
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
SALES	7,700		13,500
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
SALES			116,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	(1,366)	(34)	(2,310)	(137)
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
SALES	47,653	41,282	147,402	148,325
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	28,885	18,766	86,131	57,856
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
SALES	62,804	61,999	142,112	181,257
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
SALES	9,907	0	17,431	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
SALES	28,791	9,212	197,364	52,744
Operating Segments | Trading
Segment Reporting Information [Line Items]
SALES	22,201	25,192	65,505	92,719
Intersegment Eliminations | Timber Funds
Segment Reporting Information [Line Items]
SALES	1,274		2,152
Intersegment Eliminations | Trading
Segment Reporting Information [Line Items]
SALES	92	34	158	137
Intersegment Eliminations | Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	$ (1,366)	$ (34)	$ (2,310)	$ (137)