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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,269,701 $ 1,259,404
Less accumulated depreciation (778,306) (764,164)
Property and equipment, net 491,395 495,240
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 51,564 51,564
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 179,044 178,323
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 67,539 66,492
Mobile equipment, information technology, and office furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 194,395 191,134
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 739,626 735,979
Construction in progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 37,533 $ 35,912