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 9 Months Ended 3 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Sep. 30, 2013
Diamondback [Member]
member_of_board_of_directors
advisor
Oct. 23, 2012
Diamondback [Member]
Oct. 11, 2012
Diamondback [Member]
May 07, 2012
Diamondback [Member]
Jan. 31, 2013
Diamondback [Member]
Accounts Receivable - Related Party [Member]
Sep. 30, 2013
Minimum [Member]
Sep. 30, 2013
Maximum [Member]
Property, Plant and Equipment [Line Items]                        
Cumulative capitalization of general and administrative costs incurred and capitalized to the full cost pool $ 42,200,000   $ 42,200,000                  
Capitalized general and administrative costs 3,500,000 2,000,000 9,600,000 6,200,000                
Capitalized costs of oil and natural gas properties excluded from amortization 952,697,000   952,697,000   626,295,000              
Expected number of years amortization will commence                     3 years 5 years
Investment (shares)               7,914,036        
Promissory note receivable               63,600,000        
Payment received from Diamondback     $ 22,058,000 $ (3,199,000)           $ 18,600,000    
Ownership requirement to meet agreement           10.00%            
Number of directors allowed to serve on Board           1            
Number of advisors allowed to serve on Board           1            
Ownership interest           12.10% 21.40%   35.00%