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Debt - Schedule of Outstanding Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-Term Debt - Principal Amount $ 401,850 $ 400,000
Less: Debt Issuance Costs (7,531) (8,214)
Long-Term Debt, net $ 394,319 391,786
Line of credit | RBL Facility    
Debt Instrument [Line Items]    
Present value of proven oil and gas reserves 85.00%  
Long-Term Debt - Principal Amount $ 1,850 $ 0
Medium-term notes | 2026 Notes    
Debt Instrument [Line Items]    
Interest Rate   7.00%
Long-Term Debt - Principal Amount $ 400,000 $ 400,000
Line of credit | RBL Facility    
Debt Instrument [Line Items]    
Variable rate 5.50% 4.50%