Annual report pursuant to Section 13 and 15(d)

Supplemental Information On Oil And Gas Exploration And Production Activities (Costs Incurred In Oil and Gas Property Acquisition and Development Activities) (Details)

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Supplemental Information On Oil And Gas Exploration And Production Activities (Costs Incurred In Oil and Gas Property Acquisition and Development Activities) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]      
Acquisition $ 338,153 $ 513,904 $ 119,522
Development of proved undeveloped properties 408,121 121,787 123,489
Exploratory 26,174 93,397 3,994
Recompletions 44,633 24,643 17,259
Capitalized asset retirement obligation 3,556 2,195 1,390
Total 820,637 755,926 265,654
Diamondback Energy, Inc [Member]
      
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items]      
Acquisition 44,534 49,895 0
Development of proved undeveloped properties 6,369 22,740 0
Exploratory 17,491 3,755 0
Recompletions 50 203 0
Capitalized asset retirement obligation $ 68,444 $ 76,593 $ 0