Income Taxes - Schedule of Tax Effects of Major Items Recorded in Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Deferred tax assets: | ||
| Net operating loss carryforwards | $ 99,724 | $ 38,901 |
| Asset retirement obligations | 685 | 644 |
| Deferred foreign taxes | 0 | 940 |
| Derivatives | 16,464 | 3,452 |
| Unrealized currency loss | 822 | 164 |
| Investment in Partnership | 214,799 | 0 |
| Other | 1,892 | 0 |
| Total deferred tax assets | 334,386 | 44,101 |
| Valuation allowance | (261,501) | (9,265) |
| Net deferred tax assets | 72,885 | 34,836 |
| Deferred tax liabilities: | ||
| Power plants | (64,967) | (36,136) |
| Intangible assets | (18,320) | 0 |
| Derivatives | 0 | 0 |
| Capitalized Interest | (1,013) | 0 |
| Unrealized currency gain/loss | (17,529) | (1,384) |
| Other | 0 | 0 |
| Total deferred tax liabilities | (101,829) | (37,520) |
| Valuation allowance | 0 | 0 |
| Net deferred tax liabilities | $ 28,944 | $ 2,684 |