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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 1,231,579 $ 1,293,269  
Less: Accumulated depreciation (761,933) (726,245)  
Total property, plant and equipment, net 469,646 567,024 $ 624,959
Land      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 15,314 15,730  
Land improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 14,594 9,379  
Land improvements | Minimum      
Property, Plant and Equipment [Line Items]      
Estimated useful life 8 years    
Land improvements | Maximum      
Property, Plant and Equipment [Line Items]      
Estimated useful life 15 years    
Buildings and improvements      
Property, Plant and Equipment [Line Items]      
Estimated useful life 39 years    
Property, plant and equipment, gross $ 119,380 73,211  
Rental machinery and equipment      
Property, Plant and Equipment [Line Items]      
Estimated useful life 7 years    
Property, plant and equipment, gross $ 898,146 933,667  
Machinery and equipment - other      
Property, Plant and Equipment [Line Items]      
Estimated useful life 7 years    
Property, plant and equipment, gross $ 55,049 60,182  
Furniture, fixtures and computers      
Property, Plant and Equipment [Line Items]      
Estimated useful life 5 years    
Property, plant and equipment, gross $ 27,259 19,073  
Automobiles and other vehicles      
Property, Plant and Equipment [Line Items]      
Estimated useful life 5 years    
Property, plant and equipment, gross $ 29,971 36,796  
Aircraft      
Property, Plant and Equipment [Line Items]      
Estimated useful life 7 years    
Property, plant and equipment, gross $ 0 16,267  
Leasehold improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 10,030 8,027  
Leasehold improvements | Minimum      
Property, Plant and Equipment [Line Items]      
Estimated useful life 7 years    
Leasehold improvements | Maximum      
Property, Plant and Equipment [Line Items]      
Estimated useful life 15 years    
Construction in progress - machinery and equipment and buildings      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 61,836 $ 120,937