DERIVATIVE INSTRUMENTS (Net (Loss) Gain on Derivative Instruments) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Derivative [Line Items] | ||||
| Net (loss) gain on natural gas, oil, and NGL derivatives | $ (9,663) | $ (22,860) | $ (96,737) | $ 141,588 |
| Natural gas derivatives | ||||
| Derivative [Line Items] | ||||
| Net (loss) gain on natural gas, oil, and NGL derivatives | 14,101 | (7,077) | (26,789) | 135,868 |
| Oil derivatives | ||||
| Derivative [Line Items] | ||||
| Net (loss) gain on natural gas, oil, and NGL derivatives | (11,610) | (6,571) | (45,176) | 12,477 |
| Natural gas liquids derivatives | ||||
| Derivative [Line Items] | ||||
| Net (loss) gain on natural gas, oil, and NGL derivatives | $ (12,154) | $ (9,212) | $ (24,772) | $ (6,757) |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|