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Summary of Significant Accounting Policies Level 4 Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory, Net [Abstract]    
Finished goods and work in process $ 316,605 $ 267,115
Logs 29,517 37,273
Other raw materials and supplies 22,228 21,418
Inventories $ 368,350 $ 325,806