HIGHER AND BETTER USE TIMBERLANDS AND REAL ESTATE DEVELOPMENT INVESTMENTS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 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	(1,485)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(258)
Capitalized real estate development investments	2,340
Intersegment transfers	773
Total Balance, Ending Balance	100,517
Less: Current portion, Ending Balance	(12,815)
Non-current portion, Ending Balance	87,702
Capitalized interest	200
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	(486)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(258)
Capitalized real estate development investments	0
Intersegment transfers	773
Total Balance, Ending Balance	66,384
Less: Current portion, Ending Balance	(3,828)
Non-current portion, Ending Balance	62,556
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	(999)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	2,340
Intersegment transfers	0
Total Balance, Ending Balance	34,133
Less: Current portion, Ending Balance	(8,987)
Non-current portion, Ending Balance	$ 25,146