HIGHER AND BETTER USE TIMBERLANDS AND REAL ESTATE DEVELOPMENT INVESTMENTS (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	$ 81,791
Plus: Current portion, Beginning Balance	12,663
Total Balance, Beginning Balance	94,454
Non-cash cost of land and improved development	(5,829)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(619)
Capitalized real estate development investments	5,448
HBU properties acquired in merger with Pope Resources	27,722
Capital expenditures (silviculture)	211
Intersegment transfers	(3,979)
Total Balance, Ending Balance	117,408
Less: Current portion, Ending Balance	(9,122)
Non-current portion, Ending Balance	108,286
Capitalized interest	400
Merger with Pope Resources
Real Estate, Land and Land Development Costs [Roll Forward]
HBU properties acquired in merger with Pope Resources	27,700
Land and Timber
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	58,091
Plus: Current portion, Beginning Balance	274
Total Balance, Beginning Balance	58,365
Non-cash cost of land and improved development	(882)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(619)
Capitalized real estate development investments	0
HBU properties acquired in merger with Pope Resources	27,722
Capital expenditures (silviculture)	211
Intersegment transfers	(3,979)
Total Balance, Ending Balance	80,818
Less: Current portion, Ending Balance	(326)
Non-current portion, Ending Balance	80,492
Development Investments
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, Beginning Balance	23,700
Plus: Current portion, Beginning Balance	12,389
Total Balance, Beginning Balance	36,089
Non-cash cost of land and improved development	(4,947)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	5,448
HBU properties acquired in merger with Pope Resources	0
Capital expenditures (silviculture)	0
Intersegment transfers	0
Total Balance, Ending Balance	36,590
Less: Current portion, Ending Balance	(8,796)
Non-current portion, Ending Balance	$ 27,794