Timberland Acquisitions (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Acquired timberland primarily located in MS, LA, OK and AL [Member] Acres	Dec. 31, 2011 Other timberland acquisitions [Member] Acres
Significant Acquisitions and Disposals [Line Items]
Significant Acquisitions and Disposals, Type				asset purchase	asset purchases
Acquisition Date				fourth quarter of 2011	throughout 2011
Acres of Timberlands Acquired				250,000	58,000
Description				timberland primarily located in Mississippi, Louisiana, Oklahoma and Alabama	located in Florida, Georgia and Louisiana
Acquisition Purchase Price				$ 332,000,000	$ 94,000,000
Funding from Cash on Hand				107,000,000
Funding from Existing Revolving Credit Facility				120,000,000
Funding from Assumption of Seller's Existing Debt	$ 105,000,000	$ 0	$ 0	$ 105,000,000
Terms					funded with cash on hand or through the revolving credit facility