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Property, Plant and Equipment, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment    
Property, plant and equipment, gross $ 3,578,352 $ 3,440,965
Accumulated depreciation (1,407,314) (1,364,038)
Property, plant and equipment, net 2,171,038 2,076,927
Compression equipment, facilities and other fleet assets    
Property, Plant and Equipment    
Property, plant and equipment, gross 3,323,465 3,192,363
Land and buildings    
Property, Plant and Equipment    
Property, plant and equipment, gross 47,067 45,754
Transportation and shop equipment    
Property, Plant and Equipment    
Property, plant and equipment, gross 103,766 100,133
Computer hardware and software    
Property, Plant and Equipment    
Property, plant and equipment, gross 92,174 90,296
Other    
Property, Plant and Equipment    
Property, plant and equipment, gross $ 11,880 $ 12,419