SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Segment Sales) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
SALES	$ 195,630	$ 184,800	$ 454,760	$ 376,346
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
SALES	(5,800)		(5,800)
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
SALES			116,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	(930)	(74)	(943)	(103)
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
SALES	46,767	46,197	99,749	107,043
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	26,171	18,556	57,245	39,091
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
SALES	41,769	62,127	79,308	119,257
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
SALES	7,524	0	7,524	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
SALES	50,009	22,533	168,573	43,532
Operating Segments | Trading
Segment Reporting Information [Line Items]
SALES	24,320	35,461	43,304	67,526
Intersegment Eliminations | Timber Funds
Segment Reporting Information [Line Items]
SALES	877		877
Intersegment Eliminations | Trading
Segment Reporting Information [Line Items]
SALES	53	74	66	103
Intersegment Eliminations | Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	$ (930)	$ (74)	$ (943)	$ (103)