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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,082,126 $ 1,059,533
Less accumulated depreciation (513,872) (493,741)
Property and equipment, net 568,254 565,792
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 38,606 38,606
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 144,775 144,404
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 69,777 55,267
Mobile equipment, information technology, and office furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 143,417 138,245
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 668,839 659,708
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 16,712 $ 23,303