Timberland Acquisitions (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 acre	Dec. 31, 2013 acre
Significant Acquisitions and Disposals [Line Items]
Acres	62,344	17,094,000
Cost	$ 130,896	$ 20,401
Alabama, Florida, Georgia, Texas and Washington [Member]
Significant Acquisitions and Disposals [Line Items]
Number of timberland acquisition transactions	12
Acres	61,798
Cost	130,000
New Zealand [Member]
Significant Acquisitions and Disposals [Line Items]
Number of timberland acquisition transactions	1
Acres	546	0
Cost	923	0
Florida, Georgia and Louisiana [Member]
Significant Acquisitions and Disposals [Line Items]
Number of timberland acquisition transactions		4
Acres		17,094
Cost		$ 20,400