SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Operating Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Total Operating Income	$ 39,271	$ 49,689	$ 135,426	$ 194,253
Unallocated interest expense and other	(7,425)	(8,286)	(23,950)	(24,718)
INCOME BEFORE INCOME TAXES	31,846	41,403	111,476	169,535
Real Estate | Dispositions | Timberland
Segment Reporting Information [Line Items]
Total Operating Income			28,200	101,300
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
Total Operating Income	11,436	8,183	35,031	34,976
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
Total Operating Income	1,134	(3,293)	(1,278)	(874)
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
Total Operating Income	19,280	6,613	56,327	21,385
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
Total Operating Income	11,437	43,078	57,235	152,997
Operating Segments | Trading
Segment Reporting Information [Line Items]
Total Operating Income	1,142	481	3,380	1,456
Corporate and other
Segment Reporting Information [Line Items]
Total Operating Income	$ (5,158)	$ (5,373)	$ (15,269)	$ (15,687)