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Long-Lived Asset Impairment (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2013
Fabrication
Sep. 30, 2013
Idle compressor units
hp
CompressorUnit
Sep. 30, 2012
Idle compressor units
CompressorUnit
hp
Sep. 30, 2013
Contract water treatment assets
Sep. 30, 2013
Other long lived assets
Sep. 30, 2012
Other long lived assets
Sep. 30, 2012
Idle compressor units previously impaired
Long-Lived Asset Impairment              
Number of long-lived assets that the entity determined to retire and either sell or re-utilize key components   225 920        
Horsepower retired from the contract operations business   58,000 316,000        
Long-lived asset impairment   $ 11.0 $ 96.5   $ 1.8 $ 4.7 $ 34.8
Long-lived asset impairment $ 11.9     $ 2.4