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Fair Value (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Liabilities:    
Contingently convertible Series E units liability, Beginning Balance   $ 66,938
Contingently convertible Series E units liability, Remeasurement included in earnings (4,944) (7,700)
Contingently convertible Series E units liability, Ending Balance 74,638 74,638
Preferred shares derivative liability, Beginning Balance   28,150
Preferred shares derivative liability, Issuance   26,922
Preferred shares derivative liability, Remeasurement included in earnings (141) (598)
Preferred shares derivative liability, Ending Balance $ 55,670 $ 55,670