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Derivative Financial Instruments - Narrative (Details)
$ in Millions
2 Months Ended 12 Months Ended
Mar. 12, 2019
USD ($)
MMBTU
$ / MMBTU
$ / bbl
bbl
Dec. 31, 2018
MMBTU
$ / MMBTU
$ / bbl
bbl
Subsequent Event    
Derivative [Line Items]    
Proceeds from Derivative Instrument, Investing Activities | $ $ 2.1  
Crude Oil | Derivative Swap Contractual Period Two    
Derivative [Line Items]    
Crude oil volume (Bbl) | bbl   1,464,000
Weighted Average Price ($/Bbl / $/MMBtu) | $ / bbl   65.87
Crude Oil | Crude Oil Derivative Basis Swap Contractual Period Three    
Derivative [Line Items]    
Crude oil volume (Bbl) | bbl   1,464,000
Crude Oil | Subsequent Event | Derivative Swap Contractual Period Two    
Derivative [Line Items]    
Crude oil volume (Bbl) | bbl 730  
Weighted Average Price ($/Bbl / $/MMBtu) | $ / bbl 54.97  
Crude Oil | Subsequent Event | Crude Oil Derivative Basis Swap Contractual Period Three    
Derivative [Line Items]    
Crude oil volume (Bbl) | bbl 668  
Natural Gas (MMcf) | Derivative Swap Contractual Period Two    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / MMBTU   2.85
Natural gas volume (MMBtu) | MMBTU   2,562,000
Natural Gas (MMcf) | Natural Gas Derivative Basis Swap Contractual Period One    
Derivative [Line Items]    
Natural gas volume (MMBtu) | MMBTU   3,832,500
Natural Gas (MMcf) | Subsequent Event | Derivative Swap Contractual Period Two    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / MMBTU 2.87  
Natural gas volume (MMBtu) | MMBTU 92,000  
Natural Gas (MMcf) | Subsequent Event | Natural Gas Derivative Basis Swap Contractual Period One    
Derivative [Line Items]    
Natural gas volume (MMBtu) | MMBTU 92,000  
Short | Crude Oil | Crude Oil Derivative Basis Swap Contractual Period Three    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / bbl   2.74
Short | Crude Oil | Subsequent Event | Crude Oil Derivative Basis Swap Contractual Period Three    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / bbl 7.19  
Short | Natural Gas (MMcf) | Natural Gas Derivative Basis Swap Contractual Period One    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / MMBTU   1.14
Short | Natural Gas (MMcf) | Subsequent Event | Natural Gas Derivative Basis Swap Contractual Period One    
Derivative [Line Items]    
Weighted Average Price ($/Bbl / $/MMBtu) | $ / MMBTU 1.07