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Acquisitions - Other Information (Details) - USD ($) $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 03, 2022 | Oct. 01, 2021 | Jun. 07, 2021 | Mar. 02, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Business Combinations |  |  |  |  |  |  |  |  |
Goodwill arising in the acquisition |  |  |  |  | $ 700,800 |  | $ 700,800 |  | $ 703,371
Revenue |  |  |  |  | 82,760 | $ 70,096 | 164,311 | $ 136,814 |
Net income |  |  |  |  | $ (589) | $ (2,857) | $ 1,621 | $ (1,805) |
Author! B.V. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Business consideration transferred |  |  |  | $ 2,667 |  |  |  |  |
Goodwill arising in the acquisition |  |  |  | 1,200 |  |  |  |  |
Insight Medical Writing Limited |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Business consideration transferred |  |  | $ 15,197 |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  | 7,400 |  |  |  |  |  |
Goodwill arising in the acquisition |  |  | $ 4,700 |  |  |  |  |  |
Pinnacle 21, LLC |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Business consideration transferred |  | $ 339,075 |  |  |  |  |  |  |
Goodwill arising in the acquisition |  | $ 180,947 |  |  |  |  |  |  |
Equity acquired (as percentage) |  | 100.00% |  |  |  |  |  |  |
Discount for lack of mobility (as percentage) |  | 7.00% |  |  |  |  |  |  |
Integrated Nonclinical Development Solutions, Inc. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Business consideration transferred | $ 8,048 |  |  |  |  |  |  |  |
Goodwill arising in the acquisition | 2,910 |  |  |  |  |  |  |  |
Customer relationships | Author! B.V. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  | 1,200 |  |  |  |  |
Customer relationships | Integrated Nonclinical Development Solutions, Inc. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired | 2,380 |  |  |  |  |  |  |  |
Non-compete agreements | Author! B.V. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  | $ 100 |  |  |  |  |
Non-compete agreements | Integrated Nonclinical Development Solutions, Inc. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired | 100 |  |  |  |  |  |  |  |
Developed technology | Integrated Nonclinical Development Solutions, Inc. |  |  |  |  |  |  |  |  |
Business Combinations |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 1,040 |  |  |  |  |  |  |  |

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