SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Depreciation, Depletion and Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	$ 46,383	$ 37,123	$ 80,920	$ 75,999
New Zealand Timber | Timberland
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION		8,900		8,900
Real Estate | Large Dispositions | Timberland
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION				8,100
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	14,940	11,904	30,919	24,356
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	9,381	7,075	18,885	17,285
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	8,026	15,456	13,743	20,863
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	13,739	2,596	16,805	13,303
Operating Segments | Trading
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	0	0	0	0
Corporate and other
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	$ 297	$ 92	$ 568	$ 192