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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory, Net [Abstract]    
Finished goods and work in process $ 385,310 $ 413,020
Logs 28,549 45,574
Other raw materials and supplies 40,468 39,002
Inventories $ 454,327 $ 497,596