Higher and Better Use Timberlands and Real Estate Development Investments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, beginning balance	$ 65,450
Plus: Current portion, beginning balance	12,252
Total Balance, beginning	77,702
Non-cash cost of land and improved development	(2,077)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,656)
Capitalized real estate development investments	8,746
Capital expenditures (silviculture)	246
Intersegment transfers	4,472
Total Balance, ending	87,433
Less: Current portion, ending balance	(17,059)
Non-current portion, ending balance	70,374
Capitalized interest	100
Land and Timber
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, beginning balance	57,897
Plus: Current portion, beginning balance	6,019
Total Balance, beginning	63,916
Non-cash cost of land and improved development	(1,926)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	(1,656)
Capitalized real estate development investments	0
Capital expenditures (silviculture)	246
Intersegment transfers	4,472
Total Balance, ending	65,052
Less: Current portion, ending balance	(5,096)
Non-current portion, ending balance	59,956
Development Investments
Real Estate, Land and Land Development Costs [Roll Forward]
Non-current portion, beginning balance	7,553
Plus: Current portion, beginning balance	6,233
Total Balance, beginning	13,786
Non-cash cost of land and improved development	(151)
Timber depletion from harvesting activities and basis of timber sold in real estate sales	0
Capitalized real estate development investments	8,746
Capital expenditures (silviculture)	0
Intersegment transfers	0
Total Balance, ending	22,381
Less: Current portion, ending balance	(11,963)
Non-current portion, ending balance	$ 10,418