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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Inventory, Net [Abstract] |  |
Finished goods and work in process | $ 377,266 | $ 330,026
Logs | 57,229 | 63,208
Other raw materials and supplies | 42,178 | 40,217
Inventories | $ 476,673 | $ 433,451

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