SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Non-Cash Cost of Land and Improved Development) (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]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	$ 1,272	$ 4,336	$ 14,374	$ 11,916
Southern Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	0	0	0	0
Pacific Northwest Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	0	0	0	0
New Zealand Timber
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	0	0	128	1,824
Real Estate
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	1,272	4,336	14,246	10,092
Real Estate | Timberland | Dispositions
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT			5,700	1,800
Trading
Segment Reporting Information [Line Items]
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT	$ 0	$ 0	$ 0	$ 0