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Non-controlling Interests and Redeemable non-controlling Interest - Net Loss Attributable to Non-Controlling Interest (Details) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
May 10, 2017 | Feb. 28, 2017 | Feb. 17, 2017 | Dec. 31, 2016 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Net effect of non-controlling interests |  |  |  |  |  | $ 108,521 | $ 47,770
Non-controlling interests - redeemable Class A partnership units |  |  |  |  |  | 7,545 | 10,356
Redeemable non-controlling interests, held by related party |  |  |  |  |  | (2,622) | 0
Net effect of non-controlling interests |  |  |  |  |  | 105,899 | 47,770
Change in tax attributes, accelerated income |  |  |  |  | $ 55,900 |  |
Non-controlling interests |  |  |  |  |  | 519,896 | 602,636
Contributions from redeemable non-controlling interests |  |  |  |  |  | 0 | 31,105
Other Noncontrolling Interests |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Net effect of non-controlling interests |  |  |  |  |  | (2,174) | (2,438)
Non-controlling interests |  |  |  |  |  | 796 | 856
Class A Units | Class A Partnership Units |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Net effect of non-controlling interests |  |  |  |  |  | 103,150 | 39,850
Non-controlling interests - redeemable Class A partnership units |  |  |  |  |  | 7,545 | 10,358
Non-controlling interests |  |  |  |  |  | 519,100 | 601,780
Great Bay Solar Facility | Partnership |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Partnership agreement, funded amount |  |  |  |  |  | 15,250 | $ 42,750
Luning Solar Facility |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Contributions from redeemable non-controlling interests |  |  | $ 31,212 |  |  |  |
Abengoa-Algonquin Global Energy Solution B.V. |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Contributions from redeemable non-controlling interests |  |  |  |  |  | $ 305,000 |
Tax Investor | Bakersfield II Solar Facility | Partnership |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Partnership agreement, funded amount |  | $ 9,800 |  |  |  |  |
Tax Investor | Deerfield Wind Project | Partnership |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Partnership agreement, funded amount | $ 166,595 |  |  |  |  |  |
Tax Investor | Luning Solar Facility | Partnership |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |
Partnership agreement, funded amount |  |  |  | $ 7,826 |  |  |

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