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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,076,341 $ 1,059,533
Less accumulated depreciation (523,675) (493,741)
Property and equipment, net 552,666 565,792
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 39,307 [1] 38,606
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross [2] 159,844 [1] 144,404
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 58,720 55,267
Mobile equipment, information technology, and office furniture [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 151,939 138,245
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 641,513 [1] 659,708
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 25,018 [1] $ 23,303
[1] As of September 30, 2018, certain property and equipment have been classified as assets held for sale and excluded from these property and equipment balances. For more information, see Note 6, Assets Held for Sale.
[2] Capital lease assets are included in the 'Buildings' asset class.