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Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Liabilities: |  |  |  |
Contingently convertible Series E units liability, Beginning Balance |  |  | $ 66,938 |
Contingently convertible Series E units liability, Remeasurement included in earnings | (3,588) | 438 | 4,112 | 438
Contingently convertible Series E units liability, Ending Balance | 71,050 |  | 71,050 |
Preferred shares derivative liability, Beginning Balance |  |  | 28,150 |
Preferred shares derivative liability, Issuance |  |  | 26,922 |
Preferred shares derivative liability, Remeasurement included in earnings | (1,750) | 0 | (2,348) | 0
Preferred shares derivative liability, Ending Balance | $ 57,420 |  | $ 57,420 |

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- Definition Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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