HIGHER AND BETTER USE TIMBERLANDS AND REAL ESTATE DEVELOPMENT INVESTMENTS (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	$ 80,797
Plus: Current portion, Beginning Balance	18,350
Total Balance, Beginning Balance	99,147
Non-cash cost of land and improved development	(2,887)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(929)
Capitalized real estate development investments	4,500
Capital expenditures (silviculture)	47
Intersegment transfers	1,325
Total Balance, Ending Balance	101,203
Less: Current portion, Ending Balance	(14,248)
Non-current portion, Ending Balance	86,955
Capitalized interest	300
Land and Timber
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	59,653
Plus: Current portion, Beginning Balance	6,702
Total Balance, Beginning Balance	66,355
Non-cash cost of land and improved development	(1,034)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(929)
Capitalized real estate development investments	0
Capital expenditures (silviculture)	47
Intersegment transfers	1,325
Total Balance, Ending Balance	65,764
Less: Current portion, Ending Balance	(4,241)
Non-current portion, Ending Balance	61,523
Development Investments
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	21,144
Plus: Current portion, Beginning Balance	11,648
Total Balance, Beginning Balance	32,792
Non-cash cost of land and improved development	(1,853)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	4,500
Capital expenditures (silviculture)	0
Intersegment transfers	0
Total Balance, Ending Balance	35,439
Less: Current portion, Ending Balance	(10,007)
Non-current portion, Ending Balance	$ 25,432