SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Segment Sales) (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]
SALES	$ 200,890	$ 184,419	$ 649,991	$ 579,874
Real Estate
Segment Reporting Information [Line Items]
SALES	36,168		122,092
Operating Segments | Southern Timber
Segment Reporting Information [Line Items]
SALES	39,662	37,301	131,298	111,967
Operating Segments | Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	27,815	19,097	91,402	65,480
Operating Segments | New Zealand Timber
Segment Reporting Information [Line Items]
SALES	66,265	70,095	188,882	163,980
Operating Segments | Real Estate
Segment Reporting Information [Line Items]
SALES	36,168	17,240	122,092	121,460
Operating Segments | Trading
Segment Reporting Information [Line Items]
SALES	31,010	40,686	116,383	116,987
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	$ (30)	$ 0	$ (66)	$ 0