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Shareholders' Equity - Noncontrolling Interest Reflected in Consolidated Statement of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Class of Stock [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | $ 3,751 | $ 14,353 | $ 14,965
Series C Convertible Units |  |  |
Class of Stock [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | 3,027 | 18,792 | 18,600
Class A Units |  |  |
Class of Stock [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | (6,417) | (4,282) | (3,372)
Series D Convertible Units |  |  |
Class of Stock [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | 134 | 0 | 0
Noncontrolling interest, beneficial conversion feature | 7,569 | 0 | 0
Consolidated Subsidiaries With Noncontrolling Interest |  |  |
Class of Stock [Line Items] |  |  |
Net income (loss) attributable to noncontrolling interest | $ (562) | $ (157) | $ (263)

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