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Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Inventory, Net [Abstract]    
Finished goods and work in process $ 355,381 $ 292,826
Logs 46,571 58,299
Other raw materials and supplies 38,611 33,732
Inventories $ 440,563 $ 384,857