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Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Inventory, Net [Abstract]    
Finished goods and work in process $ 394,639 $ 330,026
Logs 47,040 63,208
Other raw materials and supplies 40,687 40,217
Inventories $ 482,366 $ 433,451