Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details)

v3.19.2
Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details) - Forecast - Not Designated as Hedging Instrument
 6 Months Ended 12 Months Ended
Dec. 31, 2019
MMBTU
$ / bbl
$ / MMBTU
bbl
Dec. 31, 2021
MMBTU
$ / bbl
$ / MMBTU
bbl
Dec. 31, 2020
MMBTU
$ / bbl
$ / MMBTU
bbl
Commodity - Oil | Put spreads      
Derivative [Line Items]      
Total volume (Bbls) | bbl 460,000 0 0
Commodity - Oil | Collar contracts with short puts (three-way collars)      
Derivative [Line Items]      
Total volume (Bbls) | bbl 2,392,000 0 3,294,000
Commodity - Oil | Oil contracts (Midland basis differential)      
Derivative [Line Items]      
Total volume (Bbls) | bbl 4,137,500 1,095,000 4,576,000
Weighted average swap price (in dollars per share) (2.64) (1.00) (1.29)
Commodity - Oil | Oil contracts (Argus Houston MEH basis differential)      
Derivative [Line Items]      
Total volume (Bbls) | bbl 0 0 552,000
Strike price (in dollars per share) | $ / MMBTU 0 0 3.30
Commodity - Oil | Put option      
Derivative [Line Items]      
Total volume (Bbls) | bbl 460,000 0 0
Strike price (in dollars per share) 65.00 0 0
Commodity - Oil | Put option | Put spreads | Long      
Derivative [Line Items]      
Strike price (in dollars per share) 65.00 0 0
Commodity - Oil | Put option | Put spreads | Short      
Derivative [Line Items]      
Strike price (in dollars per share) 42.50 0 0
Commodity - Oil | Put option | Collar contracts with short puts (three-way collars) | Long      
Derivative [Line Items]      
Strike price (in dollars per share) 56.54 0 55.69
Commodity - Oil | Put option | Collar contracts with short puts (three-way collars) | Short      
Derivative [Line Items]      
Strike price (in dollars per share) 43.65 0 44.47
Commodity - Oil | Call option | Collar contracts with short puts (three-way collars) | Short      
Derivative [Line Items]      
Strike price (in dollars per share) 67.46 0 65.72
Commodity - Natural gas | Swap contracts      
Derivative [Line Items]      
Strike price (in dollars per share) | $ / MMBTU 2.89 0 0
Total volume (MMBtu) | MMBTU 1,397,000 0 0
Commodity - Natural gas | Collar contracts (two-way collars)      
Derivative [Line Items]      
Total volume (MMBtu) | MMBTU 1,196,000 0 0
Commodity - Natural gas | Collar contracts (two-way collars) | Long      
Derivative [Line Items]      
Strike price (in dollars per share) | $ / MMBTU 3.13 0 0
Commodity - Natural gas | Collar contracts (two-way collars) | Short      
Derivative [Line Items]      
Strike price (in dollars per share) | $ / MMBTU 3.50 0 0
Commodity - Natural gas | Waha basis differential | Swap contracts      
Derivative [Line Items]      
Total volume (MMBtu) | MMBTU 4,232,000 0 4,758,000
Weighted average swap price (in dollars per share) | $ / MMBTU (1.18) 0 (1.12)