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Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Inventory, Net [Abstract]    
Finished goods and work in process $ 415,179 $ 330,026
Logs 33,534 63,208
Other raw materials and supplies 41,998 40,217
Inventories $ 490,711 $ 433,451