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Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended
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Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010 | Oct. 31, 2010 Key Energy Pressure Pumping Services, LLC Entity | Jun. 30, 2011 Key Energy Pressure Pumping Services, LLC | Jun. 30, 2011 Key Energy Pressure Pumping Services, LLC
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition date |  |  |  |  | 2010-10-01 |  |
Subsidiaries completed acquisition of certain assets |  |  |  |  | 2 |  |
Revenue from acquired business | $ 600,064 | $ 306,992 | $ 1,167,468 | $ 578,590 |  | $ 99,600 | $ 196,000
Income from operation acquired business | $ 131,860 | $ 45,757 | $ 249,407 | $ 53,588 |  | $ 22,300 | $ 49,900

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