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Summary of Significant Accounting Policies - Acquisition (Details) - USD ($) $ in Thousands | Jan. 22, 2019 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Acquisition |  |  |
Goodwill |  | $ 160,766 | $ 160,766
Orbis Education |  |  |
Acquisition |  |  |
Purchase price | $ 361,184 |  |
Intangible assets | 210,280 |  |
Goodwill | 157,825 |  |
Orbis Education | University partner relationships |  |  |
Acquisition |  |  |
Intangible assets | $ 210,000 |  |

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