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Property, Plant and Equipment, net (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Property, plant and equipment, net    
Property, plant and equipment, gross $ 5,727,703 $ 5,617,186
Accumulated depreciation (2,387,068) (2,290,294)
Property, plant and equipment, net 3,340,635 3,326,892
Compression equipment, facilities and other fleet assets    
Property, plant and equipment, net    
Property, plant and equipment, gross 5,016,357 4,916,576
Land and buildings    
Property, plant and equipment, net    
Property, plant and equipment, gross 206,382 206,257
Transportation and shop equipment    
Property, plant and equipment, net    
Property, plant and equipment, gross 297,082 297,239
Other.    
Property, plant and equipment, net    
Property, plant and equipment, gross $ 207,882 $ 197,114