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Common Stock Incentive Plan - Summary (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
General and administrative expense |  |  |  |
Common Stock Incentive Plan |  |  |  |
Share-based compensation costs recognized |  | $ 13,700 | $ 27,300 | $ 13,900
2012 Plan |  |  |  |
Common Stock Incentive Plan |  |  |  |
Plan term from the date of adoption |  | 10 years |  |
2012 Plan | Maximum |  |  |  |
Common Stock Incentive Plan |  |  |  |
Authorized shares |  | 3,985,734 |  |
CEO |  |  |  |
Severance Related Expense |  |  |  |
Cash | $ 9,817 |  |  |
Stock compensation | 17,902 |  |  |
Professional fees | 574 |  |  |
Total value of severance | 28,293 |  |  |
Amount accrued for CEO compensation prior to separation | (9,642) |  |  |
Incremental severance | $ 18,651 |  |  |
CEO | General and administrative expense |  |  |  |
Common Stock Incentive Plan |  |  |  |
Share-based compensation costs related to accelerated equity awards |  |  | $ 11,800 |

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