Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Open Commodity Derivatives (Details)

v3.5.0.2
Derivative Financial Instruments - Open Commodity Derivatives (Details)
 6 Months Ended
Jun. 30, 2016
MMBTU
$ / Derivative
bbl
2016: 3rd Quarter | NYMEX Crude Oil - Two-Way Collars  
Derivatives Fair Value [Line Items]  
Termination Period 3rd Quarter
Notional Quantity (Bbls/day) | bbl 5,000 [1]
Notional Quantity (Bbls) | bbl 460,000 [1]
2016: 3rd Quarter | NYMEX Crude Oil - Two-Way Collars | Put Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 40.00
2016: 3rd Quarter | NYMEX Crude Oil - Two-Way Collars | Call Option | Sold  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 81.47
2016: 3rd Quarter | NYMEX Natural Gas - Three-Way Collars  
Derivatives Fair Value [Line Items]  
Termination Period 3rd Quarter [2]
Notional Quantity (MMBTUs/day) | MMBTU 40,000 [1],[2]
Notional Quantity (MMBTUs) | MMBTU 2,440,000 [1],[2]
2016: 3rd Quarter | NYMEX Natural Gas - Three-Way Collars | Put Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 2.25 [2]
2016: 3rd Quarter | NYMEX Natural Gas - Three-Way Collars | Call Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 3.77 [2]
2016: 3rd Quarter | NYMEX Natural Gas - Three-Way Collars | Call Option | Sold  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 3.50 [2]
2016: 4th Quarter | NYMEX Crude Oil - Two-Way Collars  
Derivatives Fair Value [Line Items]  
Termination Period 4th Quarter
Notional Quantity (Bbls/day) | bbl 5,000 [1]
Notional Quantity (Bbls) | bbl 460,000 [1]
2016: 4th Quarter | NYMEX Crude Oil - Two-Way Collars | Put Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 40.00
2016: 4th Quarter | NYMEX Crude Oil - Two-Way Collars | Call Option | Sold  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 81.47
2016: 4th Quarter | NYMEX Natural Gas - Three-Way Collars  
Derivatives Fair Value [Line Items]  
Termination Period 4th Quarter
Notional Quantity (MMBTUs/day) | MMBTU 40,000 [1]
Notional Quantity (MMBTUs) | MMBTU 3,680,000 [1]
2016: 4th Quarter | NYMEX Natural Gas - Three-Way Collars | Put Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 2.25
2016: 4th Quarter | NYMEX Natural Gas - Three-Way Collars | Call Option | Bought  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 3.77
2016: 4th Quarter | NYMEX Natural Gas - Three-Way Collars | Call Option | Sold  
Derivatives Fair Value [Line Items]  
Weighted Average Contract Price 3.50
[1] Volume Measurements: Bbls – barrelsMMBTUs – million British Thermal Units.
[2] The natural gas derivative contracts are priced and closed in the last week prior to the related production month. Natural gas derivative contracts related to July 2016 production were priced and closed in June 2016 and are not included in the above table as these were not open derivative contracts as of June 30, 2016.