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Fair Value (Details) - USD ($) $ in Thousands | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
Assets: |  |  |  |
Interest rate cap agreement | $ 1 | $ 14 |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability | 68,076 | 72,057 | $ 74,638 | $ 66,938
Preferred shares derivative liability | $ 57,260 | 57,960 | $ 55,670 | $ 28,150
Senior Secured Revolving Credit Facility | LIBOR |  |  |  |
Fair Value Liabilities Measured On Recurring and Nonrecurring Basis |  |  |  |
Debt Instrument, Description of Variable Rate Basis | 30 day LIBOR |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.75% |  |  |
Significant Other Observable Inputs (Level 2) | Recurring |  |  |  |
Assets: |  |  |  |
Interest rate cap agreement | $ 1 | 14 |  |
Significant Unobservable Inputs (Level 3) | Recurring |  |  |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability | 68,076 | 72,057 |  |
Preferred shares derivative liability | $ 57,260 | $ 57,960 |  |

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