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Equity - Net Income and Income Tax on Non-controlling Interest (Details) - USD ($) $ in Thousands |  |  | 5 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2015 | Aug. 01, 2014 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Net income allocated to non-controlling interest |  |  |  | $ 52,300 |  | $ 21,779 |  |
Income tax expense (benefit) allocated to non-controlling interest |  |  |  | 1,071 |  | (331) |  |
Net income attributable to non-controlling interest |  |  |  | $ 51,229 | [1] | $ 22,110 | [2] | $ (4,211)
Spark HoldCo |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Economic interests percentage | 22.49% | 21.82% | 21.82% | 38.85% |  | 22.49% |  |
Spark HoldCo | NuDevco Retail and Retailco LLC |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Economic interests percentage |  |  |  | 61.15% |  | 77.51% |  |
[1] | Financial information has been recast to include results attributable to the acquisition of Major Energy Companies by an affiliate on April 15, 2016. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions," respectively, for further discussion.
[2] | (2) Financial information has been recast to include results attributable to the acquisition of Oasis Power Holdings LLC from an affiliate on May 12, 2015. See Notes 2 and 3 "Basis of Presentation and Summary of Significant Accounting Policies" and "Acquisitions", respectively, for further discussion.

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