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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, 2017
Mar. 31, 2016
Related Party Transaction [Line Items]    
Variable interest entity, ownership percentage 50.00%  
Revenue from related parties $ 5.0 $ 4.7
Cost of Sales [Member]    
Related Party Transaction [Line Items]    
Related parties amount in cost of sales $ 21.9 $ 21.5
Packaging Corporation of America (PCA) [Member]    
Related Party Transaction [Line Items]    
Variable interest entity, ownership percentage 50.00%