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Basis of Presentation (Details Textuals)
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
bbl / d
$ / Barrel
Rate
Mar. 31, 2020
USD ($)
bbl / d
Rate
Mar. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
bbl / d
$ / MMBTU
$ / Barrel
Rate
May 13, 2020
USD ($)
Dec. 31, 2019
USD ($)
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
Letters of credit outstanding $ 32,800,000 $ 32,800,000   $ 32,800,000    
Average price | $ / Barrel 20          
Percentage reduction in capital budget | Rate 44.00% 44.00%   44.00%    
Impairment of unevaluated costs   $ 244,900,000        
Write-down of oil and natural gas properties   72,541,000 $ 0      
Carrying value of long lived assets subject to impairment testing $ 1,300,000,000 1,300,000,000   $ 1,300,000,000    
Impairment of long-lived assets   $ 0        
Restructured derivative contracts            
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
Volume per day | bbl / d 14,500 14,500   14,500    
9% Senior Secured Second Lien Notes due 2021            
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
Outstanding debt principal balance $ 584,709,000 $ 584,709,000   $ 584,709,000   $ 614,919,000
Subsequent Event            
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
remaining borrowings available under bank credit facility         $ 520,300,000  
Borrowing base         615,000,000  
Letters of credit outstanding         $ 94,700,000  
Oil            
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
Average price | $ / Barrel       55.17    
Natural gas            
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items]            
Average price | $ / MMBTU       1.68