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Transactions with Affiliates (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2012
AbitibiBowater-LP [Member]
Mar. 31, 2011
AbitibiBowater-LP [Member]
Mar. 31, 2012
AbitibiBowater-LP [Member]
I Joist [Member]
Mar. 31, 2011
AbitibiBowater-LP [Member]
I Joist [Member]
Mar. 31, 2012
Canfor-LP [Member]
OSB [Member]
Mar. 31, 2011
Canfor-LP [Member]
OSB [Member]
Related Party Transaction [Line Items]                
Ownership in affiliates 50.00%              
Revenue from affiliates     $ 1.6 $ 1.4        
Expenses from affiliates         7.8 7.6 26.9 24.6
Due from affiliates 1.2 0.5            
Due to affiliates $ 5.3 $ 2.3