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Level 4 Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventory, Net [Abstract]    
Finished goods and work in process $ 290,301 $ 267,115
Logs 52,439 37,273
Other raw materials and supplies 26,440 21,418
Inventories $ 369,180 $ 325,806