Timberland Acquisitions - Summary of Timberland Acquisitions (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2011 a	Dec. 31, 2015 USD ($) a	Dec. 31, 2014 USD ($) a
Business Acquisition [Line Items]
Cost | $		$ 98,409	$ 130,896
Acres | a	250,000	36,750	62,344
Alabama
Business Acquisition [Line Items]
Cost | $		$ 0	$ 41,453
Acres | a		0	18,113
Florida
Business Acquisition [Line Items]
Cost | $		$ 5,031	$ 22,157
Acres | a		3,428	15,774
Georgia
Business Acquisition [Line Items]
Cost | $		$ 1,495	$ 46,525
Acres | a		1,443	16,573
Louisiana
Business Acquisition [Line Items]
Cost | $		$ 47,840	$ 0
Acres | a		24,494	0
Mississippi
Business Acquisition [Line Items]
Cost | $		$ 42	$ 0
Acres | a		40	0
Oregon
Business Acquisition [Line Items]
Cost | $		$ 34,052	$ 0
Acres | a		5,578	0
Texas
Business Acquisition [Line Items]
Cost | $		$ 0	$ 17,960
Acres | a		0	10,900
Washington
Business Acquisition [Line Items]
Cost | $		$ 0	$ 1,878
Acres | a		0	438
New Zealand
Business Acquisition [Line Items]
Cost | $		$ 9,949	$ 923
Acres | a		1,767	546