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Joint Venture Investment (Details)
6 Months Ended 1 Months Ended 6 Months Ended
Jun. 30, 2011
USD ($)
Jun. 30, 2010
USD ($)
Feb. 28, 2010
Matariki [Member]
NZD
Jun. 30, 2010
Matariki [Member]
Jun. 30, 2011
Matariki [Member]
Acres
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage         26.00%
Acres Of Timberland Owned By Joint Venture         300,000
Equity Method Investment Percentage of Ownership Decrease     35.00%    
Proceeds From Issuance Of Common Stock By Equity Method Investee     167,000,000    
Equity Method Investment Joint Venture Outstanding Debt     367,000,000    
Sale of Stock, Percentage of Ownership before Transaction       40.00%  
Sale of Stock, Percentage of Ownership after Transaction       26.00%  
Equity Method Investment, Realized Gain (Loss) on Disposal 0 11,545,000      
Equity Method Investment Realized Gain Loss On Disposal Tax   $ 900,000      
Equity Method Investment Realized Gain Loss On Disposal Per Share Amount   $ 0.14