SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Segment Sales) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
SALES	$ 203,196	$ 194,491
Southern Timber
Segment Reporting Information [Line Items]
SALES	43,588	39,138
Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	31,374	25,925
New Zealand Timber
Segment Reporting Information [Line Items]
SALES	52,964	40,874
Real Estate
Segment Reporting Information [Line Items]
SALES	36,064	54,289
Trading
Segment Reporting Information [Line Items]
SALES	39,212	34,265
Large Dispositions | Real Estate | Large Dispositions
Segment Reporting Information [Line Items]
SALES		42,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
SALES	(6)	$ 0
Intersegment Eliminations | Trading
Segment Reporting Information [Line Items]
SALES	$ 6