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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory, Net [Abstract]    
Finished goods and work in process $ 445,321 $ 441,774
Logs 40,837 54,301
Other raw materials and supplies 38,293 36,974
Inventories $ 524,451 $ 533,049