SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Segment Sales) (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]
SALES	$ 177,946	$ 171,421	$ 559,178	$ 567,814
Southern Timber
Segment Reporting Information [Line Items]
SALES	31,897	27,826	95,390	102,205
Pacific Northwest Timber
Segment Reporting Information [Line Items]
SALES	18,644	16,139	62,887	52,316
New Zealand Timber
Segment Reporting Information [Line Items]
SALES	69,913	42,179	187,817	125,951
Real Estate
Segment Reporting Information [Line Items]
SALES	17,240	60,626	97,149	211,296
Real Estate | Timberland | Dispositions
Segment Reporting Information [Line Items]
SALES			42,000	129,500
Trading
Segment Reporting Information [Line Items]
SALES	$ 40,252	$ 24,651	$ 115,935	$ 76,046