HIGHER AND BETTER USE TIMBERLANDS AND REAL ESTATE DEVELOPMENT INVESTMENTS (Details) $ in Thousands	9 Months Ended
	Sep. 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	(4,140)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,335)
Capitalized real estate development investments	6,889
Capital expenditures (silviculture)	161
Intersegment transfers	1,399
Total Balance, Ending Balance	102,121
Less: Current portion, Ending Balance	(22,374)
Non-current portion, Ending Balance	79,747
Capitalized interest	500
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	(1,179)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,335)
Capitalized real estate development investments	0
Capital expenditures (silviculture)	161
Intersegment transfers	1,399
Total Balance, Ending Balance	65,401
Less: Current portion, Ending Balance	(5,858)
Non-current portion, Ending Balance	59,543
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	(2,961)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	6,889
Capital expenditures (silviculture)	0
Intersegment transfers	0
Total Balance, Ending Balance	36,720
Less: Current portion, Ending Balance	(16,516)
Non-current portion, Ending Balance	$ 20,204