| Purchase Price Allocation for Acquisition of Properties (Detail) (USD $) In Thousands, unless otherwise specified | Oct. 17, 2013
 Callon Properties | Oct. 17, 2013
 Callon Properties
 Evaluated properties including equipment | Oct. 17, 2013
 Callon Properties
 Unevaluated properties | Oct. 05, 2012
 Newfield Properties | Oct. 05, 2012
 Newfield Properties
 Evaluated properties including equipment | Oct. 05, 2012
 Newfield Properties
 Unevaluated properties | May 11, 2011
 Opal Properties | May 11, 2011
 Opal Properties
 Evaluated properties including equipment | May 11, 2011
 Opal Properties
 Unevaluated properties | Aug. 10, 2011
 Fairway Properties | Aug. 10, 2011
 Fairway Properties
 Evaluated properties including equipment | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cash consideration: | |||||||||||
| Oil and natural gas properties and equipment | $ 82,424 | $ 73,176 | $ 9,248 | $ 205,788 | $ 192,723 | $ 13,065 | $ 394,377 | $ 313,165 | $ 81,212 | $ 42,870 | |
| Non-cash consideration: | |||||||||||
| Asset retirement obligation - current | 90 | 7,250 | |||||||||
| Asset retirement obligation - non-current | 4,143 | 24,414 | 382 | 7,812 | |||||||
| Sub-total – non-cash consideration | 4,233 | 31,664 | 2,525 | ||||||||
| Long-term liability | 2,143 | ||||||||||
| Total consideration | $ 86,657 | $ 237,452 | $ 396,902 | $ 50,682 | 
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- Definition Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of property, plant, and equipment recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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- Definition Amount of non-cash consideration, which includes assets transferred or liabilities assumed, for an acquisition recorded at the acquisition date. No definition available. 
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