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Shareholders' Equity / Partners' Capital - Noncontrolling Interest Activity in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Class of Stock [Line Items] |  |  |  |
Income (loss) allocated to noncontrolling interest | $ 309 | $ 7,316 | $ (22) | $ 10,391
Consolidated Subsidiaries With Noncontrolling Interest |  |  |  |
Class of Stock [Line Items] |  |  |  |
Income (loss) allocated to noncontrolling interest | (31) | (226) | 8 | (446)
Series C Convertible Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Income (loss) allocated to noncontrolling interest | 0 | 0 | 0 | 3,027
Class A Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Income (loss) allocated to noncontrolling interest | 340 | (27) | (30) | 108
Series D Convertible Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Income (loss) allocated to noncontrolling interest | 0 | 0 | 0 | 133
Beneficial conversion feature | $ 0 | $ 7,569 | $ 0 | $ 7,569

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