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Long-Lived Asset Impairment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2010
Flood
item
Dec. 31, 2012
Idle compressor units
item
hp
Dec. 31, 2011
Idle compressor units
Dec. 31, 2010
Idle compressor units
item
hp
Dec. 31, 2010
Idle compressor units
Contract operations segments
hp
item
Dec. 31, 2012
Idle compressor units previously impaired
Dec. 31, 2011
Other long lived assets
Dec. 31, 2012
Other long lived assets
Dec. 31, 2012
Property, plant and equipment
Dec. 31, 2012
Intangible assets
Dec. 31, 2012
Intangible assets
LONG-LIVED ASSET IMPAIRMENT                              
Number of long-lived assets that the entity determined to retire and either sell or re-utilize key components         105 930   1,800 323            
Horsepower retired from the contract operations business           318,000   600,000 61,400            
Long-lived asset impairment $ 46,800 $ 183,445 $ 6,068 $ 143,874 $ 3,300 $ 97,100 $ 5,700 $ 133,000 $ 7,600 $ 34,800 $ 400 $ 4,700 $ 17,700 $ 29,100 $ 29,100