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Summary of Significant Accounting Policies:Inventory Valuation (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Inventory, Net [Abstract]    
Finished goods and work in process $ 441,774 $ 377,266
Logs 54,301 57,229
Other raw materials and supplies 36,974 42,178
Inventories $ 533,049 $ 476,673