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Long-Term Debt (Details)
$ in Thousands
12 Months Ended
Nov. 21, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]      
Long-term debt   $ 170,000 $ 78,828
Long-term debt, percentage bearing annual interest rate   3.86%  
Amount of borrowings   $ 234,700  
Repayments of borrowings   (143,508) (103,002)
Commitment fees on borrowings   700 800
Amortization of deferred financing costs   412 325
EEH Credit Agreement      
Debt Instrument [Line Items]      
Unamortized deferring financing costs $ 1,200    
Current borrowing base under EEH credit agreement $ 325,000 325,000  
Covenant terms, minimum current ratio 1.0    
Covenant terms, maximum leverage ratio 4.0    
Long-term debt   170,000 $ 78,800
Additional borrowing base available under credit agreement   $ 155,000  
EEH Credit Agreement | Minimum      
Debt Instrument [Line Items]      
Applicable margin percentage 0.75%    
Commitment fee percentage 0.375%    
EEH Credit Agreement | Maximum      
Debt Instrument [Line Items]      
Applicable margin percentage 1.75%    
Commitment fee percentage 0.50%    
EEH Credit Agreement | London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Applicable margin percentage 1.00%    
EEH Credit Agreement | London Interbank Offered Rate (LIBOR) | Minimum      
Debt Instrument [Line Items]      
Applicable margin percentage 1.75%    
EEH Credit Agreement | London Interbank Offered Rate (LIBOR) | Maximum      
Debt Instrument [Line Items]      
Applicable margin percentage 2.75%    
EEH Credit Agreement | Federal Funds Rate      
Debt Instrument [Line Items]      
Applicable margin percentage 0.50%    
Earthstone Energy Credit Agreement      
Debt Instrument [Line Items]      
Averaged interest rate on outstanding debt   4.42% 4.16%
Capitalized costs associated with borrowings   $ 1,600 $ 500