SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Operating Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Total Operating Income	$ 28,485	$ 38,552
Unallocated interest expense and other	(10,032)	(8,425)
Total Income before Income Taxes	18,453	30,127
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
Total Operating Income	(1,100)
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
Total Operating Income		28,700
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Total Operating Income	17,347	15,070
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Total Operating Income	1,350	(948)
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
Total Operating Income	13,944	5,448
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
Total Operating Income	1,501	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Total Operating Income	1,687	26,774
Operating Segments | Trading
Segment Reporting Information [Line Items]
Total Operating Income	244	(19)
Corporate and Other
Segment Reporting Information [Line Items]
Total Operating Income	$ (7,588)	$ (7,773)