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Acquisition (Details) (USD $)
0 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended
Jul. 03, 2013
Mar. 31, 2014
Mar. 31, 2013
Jul. 03, 2013
Gulf of Mexico Acquisition [Member]
platform
well
Jul. 03, 2013
10% Senior Notes [Member]
Gulf of Mexico Acquisition [Member]
Mar. 31, 2014
Senior Notes [Member]
10% Senior Notes [Member]
Dec. 31, 2013
Senior Notes [Member]
10% Senior Notes [Member]
Jul. 03, 2013
Senior Notes [Member]
10% Senior Notes [Member]
Aug. 19, 2010
Senior Notes [Member]
10% Senior Notes [Member]
Jul. 03, 2013
General and Administrative Expense [Member]
Bridge Loan [Member]
Gulf of Mexico Acquisition [Member]
Business Acquisition [Line Items]                    
Purchase price         $ 188,800,000          
Number of wells acquired       16            
Number of platforms purchased       7            
Principal amount 200,000,000         350,000,000 350,000,000 200,000,000 150,000,000  
Interest rate of Senior Notes           10.00% 10.00% 10.00% 10.00%  
Payments of financing costs 5,000,000 81,000 21,000              
Acquisition-related costs $ 4,000,000                 $ 2,600,000