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Acquisitions - Summary of Purchase Price (Details) - USD ($)
$ / shares in Units, $ in Thousands
May 10, 2018
Sep. 30, 2019
Dec. 31, 2018
May 09, 2018
Business Acquisition [Line Items]        
Common stock value   $ 542 $ 542  
Stone Energy Corporation        
Business Acquisition [Line Items]        
Stone common stock - issued and outstanding as of May 9, 2018       20,038,000
Stone common stock price $ 35.49      
Common stock value $ 711,149      
Stone common stock warrants - issued and outstanding as of May 9, 2018       3,528,000
Stone common stock warrants price $ 5.90      
Common stock warrants value $ 20,815      
Total purchase price $ 731,964