Annual report pursuant to Section 13 and 15(d)

Property And Equipment (Narrative) (Details)

v2.4.0.8
Property And Equipment (Narrative) (Details) (USD $)
 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Diamondback [Member]
member_of_board_of_directors
advisor
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]
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Property, Plant and Equipment [Line Items]                    
Cumulative capitalization of general and administrative costs incurred and capitalized to the full cost pool $ 47,500,000 $ 32,600,000                
Capitalized general and administrative costs 14,900,000 9,100,000 5,400,000              
Capitalized costs of oil and natural gas properties excluded from amortization 950,590,000 626,295,000                
Loss on disposal of Belize properties, net of tax 0 (3,465,000) 0              
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 33,209,000 (2,404,000) 13,067,000         18,600,000    
Gain on sale of oil and gas property (508,000) 7,300,000 0              
Oil and gas property, decrease related to contribution   $ 213,000,000                
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       7.20% 21.40%   35.00%