Timber and Timberlands Timber and Timberlands (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 acre
Property, Plant and Equipment [Line Items]
Timberland Acquisitions	2
Payments under timber cutting contracts, due in 2013	$ 1.6
Payments under timber cutting contracts, due in 2014	4.1
Payments under timber cutting contracts, due in 2015	6.3
Payments under timber cutting contracts, due in 2016	3.3
Red Springs [Member]
Property, Plant and Equipment [Line Items]
Acres aquired through timberland purchase	2,981
Payments to Acquire and Develop Real Estate	3.9
Taylor Pines [Member]
Property, Plant and Equipment [Line Items]
Acres aquired through timberland purchase	6,304
Payments to Acquire and Develop Real Estate	$ 7.9