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Summary of Significant Accounting Policies:Property and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 1,079,710   $ 1,064,339
Less accumulated depreciation (615,337)   (577,115)
Property and equipment, net 464,373 $ 465,492 487,224
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 39,304   38,888
Buildings [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 138,541   164,878 [1]
Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 59,483   49,509
Mobile equipment, information technology, and office furniture [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 159,405   150,712
Machinery and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 658,290   629,337
Construction in progress [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 24,687   $ 31,015
[1]
As of December 31, 2018, capital lease assets were included in the "Buildings" asset class. For additional information related to leases, see Note 8, Leases.