SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Non-Cash Cost of Land and Improved Development) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	$ 2,880	$ 3,471	$ 13,102	$ 7,579
Real Estate | Timberland | Dispositions
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT		1,800	5,700	1,800
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	0	0	0	0
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	0	0	0	0
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	128	0	128	1,824
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	2,752	3,471	12,974	5,755
Operating Segments | Trading
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	$ 0	$ 0	$ 0	$ 0