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Income Taxes - Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |
Income (loss) before income taxes | $ (5,082) | $ (38,582) | $ (113,197)
Ireland |  |  |
Income Taxes [Line Items] |  |  |
Income (loss) before income taxes | (27,205) | (50,134) | (42,604)
U.S. |  |  |
Income Taxes [Line Items] |  |  |
Income (loss) before income taxes | 22,335 | 10,401 | (70,340)
France |  |  |
Income Taxes [Line Items] |  |  |
Income (loss) before income taxes | $ (212) | $ 1,151 | $ (253)

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