Acquisitions and divestitures (2014 Divestitures) - Additional Information (Detail) - Predecessor
$ in Thousands |
1 Months Ended |
12 Months Ended |
|
Jul. 31, 2014
USD ($)
|
May 31, 2014
USD ($)
|
Dec. 31, 2014
USD ($)
Divestiture
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Number Of Divestitures | Divestiture |
|
|
4
|
| Number Of Planned Divestitures | Divestiture |
|
|
5
|
| Eagle Ford Formation, Texas |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
|
|
$ 20,007
|
| Andrews County, TX and Osage County, OK |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
|
|
$ 24,478
|
| Scout Energy Group I, LP | Fort Worth Basin |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
|
$ 23,702
|
|
| RKI Exploration And Production, LLC | Delaware Basin |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
|
$ 124,717
|
|
| RAM Energy, LLC | Ark-La-Tex |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
$ 49,078
|
|
|
| RAM Energy, LLC | Central Basin [Member] |
|
|
|
| Long Lived Assets Held For Sale [Line Items] |
|
|
|
| Proceeds from sale of oil and gas properties |
$ 46,830
|
|
|