Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Details)

v3.3.0.814
Basis of Presentation - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Basis Of Presentation [Line Items]          
Net cash provided by operating activities     $ 80,910 $ 274,460  
Net cash used in investing activities     $ (202,552) (271,168)  
Percentage of discount from proved reserves     10.00%    
Ceiling test write-down of oil and natural gas properties $ 252,772 $ 0 $ 513,162 0 $ 0
Revolving bank credit facility borrowing base 500,000   500,000    
Second Lien Term Loan          
Basis Of Presentation [Line Items]          
Term loan $ 300,000   $ 300,000    
Debt instrument maturity date     May 15, 2020    
Debt instrument interest rate 9.00%   9.00%    
Revolving bank credit facility borrowing base $ 500,000   $ 500,000    
Reclassifications          
Basis Of Presentation [Line Items]          
Net cash provided by operating activities       3,400  
Net cash used in investing activities       $ 3,400