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Transactions With Related Party (Details) - Unconsolidated variable interest entity [Member] - Louisiana Timber Procurement Company, L.L.C. (LTP) [Member] - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Related Party Transaction [Line Items]    
Variable interest entity, ownership percentage 50.00%  
Revenue from related parties $ 4.7 $ 6.3
Related parties amount in cost of sales $ 21.5 $ 21.9
Packaging Corporation of America (PCA) [Member]    
Related Party Transaction [Line Items]    
Variable interest entity, ownership percentage 50.00%