Derivatives - Narrative (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2014
USD ($)
|
Sep. 30, 2015
USD ($)
Institution
|
Sep. 30, 2014
USD ($)
|
|
| Derivative Instruments and Hedging Activities Disclosure | ||||
| Number of counterparties to open derivative contracts | Institution | 9 | |||
| Gain on derivative contracts | $ (42,211) | $ (132,575) | $ (59,034) | $ (4,792) |
| Commodity Derivatives | ||||
| Derivative Instruments and Hedging Activities Disclosure | ||||
| Gain on derivative contracts | (42,200) | (132,600) | (59,000) | (4,800) |
| Commodity Derivatives | Cash | ||||
| Derivative Instruments and Hedging Activities Disclosure | ||||
| Gain on derivative contracts | $ (67,300) | $ (3,400) | $ (278,600) | 92,900 |
| Early Settlements | Commodity Derivatives | Cash | ||||
| Derivative Instruments and Hedging Activities Disclosure | ||||
| Gain on derivative contracts | $ 69,600 | |||
| Lenders of Senior Credit Facility | ||||
| Derivative Instruments and Hedging Activities Disclosure | ||||
| Number of counterparties to open derivative contracts | Institution | 4 | |||