HIGHER AND BETTER USE TIMBERLANDS AND REAL ESTATE DEVELOPMENT INVESTMENTS (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	$ 70,374
Plus: Current portion, Beginning Balance	17,059
Total Balance, Beginning Balance	87,433
Non-cash cost of land and improved development	(2,183)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,979)
Capitalized real estate development investments	11,780
Capital expenditures (silviculture)	195
Intersegment transfers	3,380
Total Balance, Ending Balance	98,626
Less: Current portion, Ending Balance	(19,403)
Non-current portion, Ending Balance	79,223
Capitalized interest	300
Land and Timber
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	59,956
Plus: Current portion, Beginning Balance	5,096
Total Balance, Beginning Balance	65,052
Non-cash cost of land and improved development	(1,579)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,979)
Capitalized real estate development investments	0
Capital expenditures (silviculture)	195
Intersegment transfers	4,142
Total Balance, Ending Balance	65,831
Less: Current portion, Ending Balance	(6,024)
Non-current portion, Ending Balance	59,807
Development Investments
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	10,418
Plus: Current portion, Beginning Balance	11,963
Total Balance, Beginning Balance	22,381
Non-cash cost of land and improved development	(604)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	11,780
Capital expenditures (silviculture)	0
Intersegment transfers	(762)
Total Balance, Ending Balance	32,795
Less: Current portion, Ending Balance	(13,379)
Non-current portion, Ending Balance	$ 19,416