Quarterly report pursuant to Section 13 or 15(d)

Property And Equipment (Narrative) (Details)

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Property And Equipment (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
May 07, 2012
Contribution Agreement With Diamondback Energy Inc [Member]
Property, Plant and Equipment [Line Items]          
Cumulative capitalization of general and administrative costs incurred and capitalized to the full cost pool     $ 27,630,000    
Capitalized general and administrative costs 2,160,000 1,411,000 4,136,000 2,788,000  
Outstanding common stock prior to closing, interest percent, received in exchange for contribution of oil and gas interests         35.00%
Non-interest bearing promissory note received in exchange for contribution of oil and gas interests         $ 63,590,050.00
Minimum threshold of ownership interest for designating a nominee to serve on the board of directors         10.00%