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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended
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May 25, 2021 | Jun. 30, 2021
Shareholders' Equity |  |
Total consideration for repurchase of shares, including related transaction fees |  | $ 394,149
Share repurchase agreement with GSK |  |
Shareholders' Equity |  |
Number of shares repurchased | 32,005,260 |
Repurchase price per share | $ 12.25 |
Total consideration for repurchase of shares, including related transaction fees | $ 394,100 |

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