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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventory, Net [Abstract]    
Finished goods and work in process $ 410,666 $ 441,774
Logs 43,322 54,301
Other raw materials and supplies 38,600 36,974
Inventories $ 492,588 $ 533,049