Timberland Acquisitions - Narrative (Details) $ in Thousands			1 Months Ended	12 Months Ended
	May 10, 2016 USD ($) a	Apr. 28, 2016 USD ($)	Nov. 30, 2011 a	Dec. 31, 2016 USD ($) a acquisition	Dec. 31, 2015 USD ($) a acquisition	Dec. 31, 2014 USD ($)	Sep. 30, 2016 a	May 31, 2016 USD ($) a
Business Acquisition [Line Items]
Acres of timberland owned | a				2,700,000			400,000
Acres acquired | a	61,000		250,000	110,727	36,750
Cost	$ 263,000			$ 366,481	$ 98,409	$ 130,896
Acquisition costs				1,316	$ 0	$ 0
Debt, carrying amount				$ 1,065,296
Incremental Term Loan Agreement
Business Acquisition [Line Items]
Debt instrument term		10 years
Debt, carrying amount		$ 300,000
Menesha Forest Products Corporation
Business Acquisition [Line Items]
Acres of timberland owned | a				132,000
Florida, Georgia, and Texas
Business Acquisition [Line Items]
Acres acquired | a				50,000
Cost				$ 103,900
Number of timberland acquisition transactions | acquisition				5
Florida Georgia Louisianna Mississippi and Oregon
Business Acquisition [Line Items]
Acres acquired | a					35,000
Cost					$ 88,500
Number of timberland acquisition transactions | acquisition					8
New Zealand
Business Acquisition [Line Items]
Acres acquired | a				0	1,767
Cost				$ 0	$ 9,949
Number of timberland acquisition transactions | acquisition					1
Washington Disposition | Incremental Term Loan Agreement
Business Acquisition [Line Items]
Debt instrument term		10 years
Debt, carrying amount		$ 300,000
Washington Disposition | Disposal Group, Not Discontinued Operations
Business Acquisition [Line Items]
Acres of timberland divested | a								55,000
Consideration received from sale								$ 130,000