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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,094,788 $ 1,059,533
Less accumulated depreciation (532,763) (493,741)
Property and equipment, net 562,025 565,792
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 40,205 38,606
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross [1] 160,785 144,404
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 55,936 55,267
Mobile equipment, information technology, and office furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 145,585 138,245
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 670,850 659,708
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 21,427 $ 23,303
[1] Capital lease assets are included in the 'Buildings' asset class.