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Fair Value - Fair Value Hierarchy (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Liabilities: |  |  |  |
Contingently convertible Series E units liability | $ 0 | $ 69,957 | $ 68,601 | $ 72,057
Preferred shares derivative liability | 65,730 | 62,790 | $ 60,260 | $ 57,960
Recurring |  |  |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability |  | 69,957 |  |
Preferred shares derivative liability | 65,730 | 62,790 |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring |  |  |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability |  | 0 |  |
Preferred shares derivative liability | 0 | 0 |  |
Significant Other Observable Inputs (Level 2) | Recurring |  |  |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability |  | 0 |  |
Preferred shares derivative liability | 0 | 0 |  |
Significant Unobservable Inputs (Level 3) | Recurring |  |  |  |
Liabilities: |  |  |  |
Contingently convertible Series E units liability |  | 69,957 |  |
Preferred shares derivative liability | $ 65,730 | $ 62,790 |  |

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- Definition Fair value of Series E convertible units that represent non-voting interests in the Operating Partnership that may be settled into a variable number of Series D units or Class A units on a specified date. + References No definition available. + Details
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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=64837297&loc=SL5624163-113959 + Details
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