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
 1 Months Ended 3 Months Ended
May. 05, 2015
Apr. 23, 2015
Apr. 30, 2015
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Basis Of Presentation [Line Items]            
Net cash provided by operating activities       $ 52,918 $ 136,055  
Net cash used in investing activities       $ (135,167) (112,892)  
Percentage of discount from proved reserves       10.00%    
Ceiling test write-down of oil and natural gas properties       $ 260,390 $ 0  
Aggregate principal amount of existing notes       900,000   $ 900,000
Subsequent Event            
Basis Of Presentation [Line Items]            
Reduction of base rate   33.00%        
Aggregate principal amount of existing notes   $ 900,000        
Revolving Bank Credit Facility Due November 2018 | Subsequent Event            
Basis Of Presentation [Line Items]            
Revolving bank credit facility borrowing base   $ 600,000 $ 600,000      
Reduction of base rate     33.00%      
Aggregate principal amount of existing notes     $ 900,000      
Second Lien Term Loan | Subsequent Event            
Basis Of Presentation [Line Items]            
Revolving bank credit facility borrowing base $ 500,000          
Term loan $ 300,000          
Debt instrument term 5 years          
Reclassifications            
Basis Of Presentation [Line Items]            
Net cash provided by operating activities       17,600    
Net cash used in investing activities       $ 17,600