Fair Value Measurement - (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
$ (75,907)
|
$ (37,253)
|
| Level 1 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(1,297)
|
2,196
|
| Level 2 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(28,042)
|
2,263
|
| Level 3 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(46,568)
|
(41,712)
|
| Commodity contract derivatives |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(2,239)
|
4,459
|
| Commodity contract derivatives | Level 1 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(1,297)
|
2,196
|
| Commodity contract derivatives | Level 2 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(942)
|
2,263
|
| Commodity contract derivatives | Level 3 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
0
|
0
|
| Convertible debt conversion liability |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(27,100)
|
|
| Convertible debt conversion liability | Level 1 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
0
|
|
| Convertible debt conversion liability | Level 2 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(27,100)
|
|
| Convertible debt conversion liability | Level 3 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
0
|
|
| Contingent consideration for acquisitions |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
(46,568)
|
(41,712)
|
| Contingent consideration for acquisitions | Level 1 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
0
|
0
|
| Contingent consideration for acquisitions | Level 2 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
0
|
0
|
| Contingent consideration for acquisitions | Level 3 |
|
|
| Assets (liabilities) measured at fair value |
|
|
| Assets (liabilities), fair value |
$ (46,568)
|
$ (41,712)
|