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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]              
Property, plant and equipment, gross $ 1,221,951     $ 1,221,951     $ 1,231,579
Less: Accumulated depreciation (823,256)     (823,256)     (761,933)
Total property, plant and equipment, net 398,695     398,695     469,646
Proceeds from sale of assets       4,419 $ 10,690    
Land              
Property, Plant and Equipment [Line Items]              
Property, plant and equipment, gross 14,827     14,827     15,314
Land improvements              
Property, Plant and Equipment [Line Items]              
Property, plant and equipment, gross 15,082     $ 15,082     14,594
Land improvements | Minimum              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       8 years      
Land improvements | Maximum              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       15 years      
Buildings and improvements              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       39 years      
Property, plant and equipment, gross 104,077     $ 104,077     119,380
Rental machinery and equipment              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       7 years      
Property, plant and equipment, gross 895,083     $ 895,083     898,146
Machinery and equipment - other              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       7 years      
Property, plant and equipment, gross 61,531     $ 61,531     55,049
Furniture, fixtures and computers              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       5 years      
Property, plant and equipment, gross 24,718     $ 24,718     27,259
Automobiles and other vehicles              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       5 years      
Property, plant and equipment, gross 29,533     $ 29,533     29,971
Leasehold improvements              
Property, Plant and Equipment [Line Items]              
Property, plant and equipment, gross 11,823     $ 11,823     10,030
Leasehold improvements | Minimum              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       7 years      
Leasehold improvements | Maximum              
Property, Plant and Equipment [Line Items]              
Estimated useful lives       15 years      
Construction in progress - machinery and equipment and land improvements              
Property, Plant and Equipment [Line Items]              
Property, plant and equipment, gross 65,277     $ 65,277     $ 61,836
International Services              
Property, Plant and Equipment [Line Items]              
Impairment of Long-Lived Assets Held-for-use     $ 300        
International Services | Buildings and improvements              
Property, Plant and Equipment [Line Items]              
Reclassification of property, plant and equipment to assets held for sale 300   $ 4,100 $ 300 $ 4,100 $ 4,500  
Proceeds from sale of assets $ 2,600 $ 800