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Debt - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |
Exchange agreement, aggregate principal amount |  | $ 247,200 |  |  | $ 247,200 |
Shares authorized for issuance (in shares) |  | 44.0 |  |  | 44.0 |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |  | $ 0.01 | $ 0.01 | $ 0.01
Exchange agreement, accrued and unpaid interest |  |  |  |  | $ 1,300 |
Gain (loss) on extinguishment of debt, additional paid-in capital |  | $ 215,000 |  |  | 215,000 |
Gain (loss) on extinguishment of debt, fair value of common shares issued |  | 400 |  |  | 400 |
Loss on exchange of convertible debt | $ 0 | $ 4,501 | $ 36,100 | $ 0 | 40,624 |
Proceeds from termination of capped call confirmations |  |  |  | $ 0 | $ 19,875 |

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