Quarterly report pursuant to Section 13 or 15(d)

Property And Equipment (Narrative) (Details)

v2.4.0.8
Property And Equipment (Narrative) (Details) (USD $)
3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Mar. 31, 2014
Diamondback [Member]
Oct. 31, 2012
Diamondback [Member]
Oct. 11, 2012
Diamondback [Member]
May 07, 2012
Diamondback [Member]
Jan. 31, 2013
Diamondback [Member]
Accounts Receivable - Related Party [Member]
Mar. 31, 2014
Minimum [Member]
Mar. 31, 2014
Maximum [Member]
Mar. 31, 2014
Diamondback Energy, Inc [Member]
May 07, 2012
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 $ 53,800,000                      
Capitalized general and administrative costs 6,300,000 2,900,000                    
Capitalized costs of oil and natural gas properties excluded from amortization 1,138,085,000   950,590,000                  
Expected number of years amortization will commence                 3 years 5 years    
Investment (shares)       3,379,500   7,914,036         3,379,500 7,914,036
Promissory note receivable           63,600,000            
Payment received from Diamondback $ 27,944,000 $ (3,592,000)           $ 18,600,000        
Ownership interest         21.40%   35.00%       6.70%