SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Depreciation, Depletion and Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	$ 34,806	$ 28,707	$ 115,726	$ 104,706
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	13,672	12,736	44,591	37,092
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	7,802	6,481	26,687	23,766
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	7,544	8,478	21,287	20,477
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
DEPRECIATION, DEPLETION AND AMORTIZATION	5,491	735	22,296	22,902
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	$ 277	$ 865	$ 469