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Property and Equipment (Components of Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Components of Property, Plant and Equipment    
Property and equipment $ 105,117 $ 83,644
Less accumulated depreciation (30,426) (23,638)
Property and equipment, net 74,691 60,006
Land    
Components of Property, Plant and Equipment    
Property and equipment 5,837 4,988
Buildings and leasehold improvements    
Components of Property, Plant and Equipment    
Property and equipment 42,986 23,038
Machinery, equipment and rental tools    
Components of Property, Plant and Equipment    
Property and equipment 36,187 29,427
Equipment in progress    
Components of Property, Plant and Equipment    
Property and equipment 3,235 11,916
Furniture and fixtures    
Components of Property, Plant and Equipment    
Property and equipment 1,969 1,838
Transportation equipment    
Components of Property, Plant and Equipment    
Property and equipment 3,059 1,714
Computer equipment and software    
Components of Property, Plant and Equipment    
Property and equipment $ 11,844 $ 10,723