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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,139,690 $ 1,107,257
Less accumulated depreciation (692,360) (630,308)
Property and equipment, net 447,330 476,949
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 38,274 39,304
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 144,845 140,008
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 63,033 61,187
Mobile equipment, information technology, and office furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 175,931 165,445
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 681,230 666,467
Construction in progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 36,377 $ 34,846