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Fair Value - Interest Rate Cap, Convertible Series E, and Preferred Shares (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Assets: |  |  |
Interest rate cap agreement | $ 0 | $ 14 |
Liabilities: |  |  |
Contingently convertible Series E units liability | 69,957 | 72,057 | $ 66,938
Preferred shares derivative liability | 62,790 | 57,960 | $ 28,150
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring |  |  |
Assets: |  |  |
Interest rate cap agreement | 0 | 0 |
Liabilities: |  |  |
Contingently convertible Series E units liability | 0 | 0 |
Preferred shares derivative liability | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Recurring |  |  |
Assets: |  |  |
Interest rate cap agreement | 0 | 14 |
Liabilities: |  |  |
Contingently convertible Series E units liability | 0 | 0 |
Preferred shares derivative liability | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Recurring |  |  |
Assets: |  |  |
Interest rate cap agreement | 0 | 0 |
Liabilities: |  |  |
Contingently convertible Series E units liability | 69,957 | 72,057 |
Preferred shares derivative liability | $ 62,790 | $ 57,960 |

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