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Debt - Additional Information (Details) - Credit Facility - Revolving Credit Facility - USD ($)
3 Months Ended
Mar. 31, 2020
Apr. 30, 2020
Debt Instrument    
Debt outstanding $ 46,000,000.0  
Outstanding letters of credit 2,900,000  
Maximum borrowing capacity 600,000,000.0  
Borrowing base $ 225,000,000.0  
Commitment fee 0.50%  
Average interest rate during period 3.70%  
Percentage of proved reserves pledged as collateral 85.00%  
Total net leverage ratio (no greater than) 3.50  
Interest coverage ratio (no less than) 2.25  
Leverage ratio 0.34  
Coverage ratio 29.61  
Minimum | LIBOR    
Debt Instrument    
Basis spread on variable rate 2.00%  
Minimum | Base Rate    
Debt Instrument    
Basis spread on variable rate 1.00%  
Maximum | LIBOR    
Debt Instrument    
Basis spread on variable rate 3.00%  
Maximum | Base Rate    
Debt Instrument    
Basis spread on variable rate 2.00%  
Subsequent Event    
Debt Instrument    
Borrowing base   $ 75,000,000.0