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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Inventory, Net [Abstract]    
Finished goods and work in process $ 473,584 [1] $ 377,266
Logs 46,307 [1] 57,229
Other raw materials and supplies 39,552 [1] 42,178
Inventories $ 559,443 $ 476,673
[1] As of September 30, 2018, certain inventories have been classified as assets held for sale and excluded from these inventory balances. For more information, see Note 6, Assets Held for Sale.