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Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Goodwill [Line Items] |  |
Goodwill |  | $ 1,081,603
Accumulated impairment losses |  | (455,892)
Goodwill | $ 647,541 | 625,711
Goodwill recorded in connection with a business acquisition | 21,753 |
Foreign currency translation | 77 |
Healthcare |  |
Goodwill [Line Items] |  |
Goodwill |  | 644,983
Accumulated impairment losses |  | (190,024)
Goodwill | 454,959 | 454,959
Goodwill recorded in connection with a business acquisition | 0 |
Foreign currency translation | 0 |
Education |  |
Goodwill [Line Items] |  |
Goodwill |  | 123,652
Accumulated impairment losses |  | (1,417)
Goodwill | 143,989 | 122,235
Goodwill recorded in connection with a business acquisition | 21,677 |
Foreign currency translation | 77 |
Commercial: |  |
Goodwill [Line Items] |  |
Goodwill |  | 312,968
Accumulated impairment losses |  | (264,451)
Goodwill | 48,593 | $ 48,517
Goodwill recorded in connection with a business acquisition | 76 |
Foreign currency translation | $ 0 |

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