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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Inventory, Net [Abstract]    
Finished goods and work in process $ 456,509 $ 413,020
Logs 40,247 45,574
Other raw materials and supplies 39,558 39,002
Inventories $ 536,314 $ 497,596