SEGMENT AND GEOGRAPHICAL INFORMATION - Schedule of Operating Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Operating Income	$ 74,388	$ 107,027	$ 170,068
Unallocated interest expense and other	(37,595)	(26,409)	(27,502)
Total Income before Income Taxes	36,793	80,618	142,566
Charges	17,166
Southern Timber
Segment Reporting Information [Line Items]
Timber write-offs from casualty events	6,000
Timber Funds, Portion Attributable To Noncontrolling Interests
Segment Reporting Information [Line Items]
Operating Income	11,600
Timber write-offs from casualty events	7,300
Timber Funds, Portion Attributable To Parent
Segment Reporting Information [Line Items]
Timber write-offs from casualty events	1,800
Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
Operating Income	28,700
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Operating Income	41,247	57,804	44,245
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Operating Income	(9,979)	(12,427)	8,137
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
Operating Income	29,984	48,035	62,754
Operating Segments | Timber Funds
Segment Reporting Information [Line Items]
Operating Income	(13,195)	0	0
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Operating Income	71,951	38,665	76,240
Operating Segments | Trading
Segment Reporting Information [Line Items]
Operating Income	(462)	8	953
Corporate and Other
Segment Reporting Information [Line Items]
Operating Income	$ (45,158)	$ (25,058)	$ (22,261)