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Noncontrolling Interest (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2008
Noncontrolling Interest [Line Items]      
% of non controlling interest purchased     75.00%
Estimated purchase price     $ 18.5
Business Combination, Separately Recognized Transactions, Assets Recognized     2.0
Percentage of non controlling interest acquired 25.00%    
Business Acquisition, Cost of Acquired Entity, Purchase Price     56.5
Payment to acquire remaining 25% of LP Brazil 24.0    
Notes Payable 7.9 0  
Brazilian Term Credit Facility Maturing 2017 [Member]
     
Noncontrolling Interest [Line Items]      
Notes Payable 10.0 0  
Chilian Term Credit Facility Maturing 2019 [Member]
     
Noncontrolling Interest [Line Items]      
Notes Payable $ 40.5 $ 42.3