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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets |
| Estimated Useful Life
Customer relationships | 8 - 23 years
Order backlog | 3 - 5 years
Trade names | 3 years
Patient database | 7 years
Technology assets | 5 years
The carrying amount of Intangible Assets for the years ended December 31, 2024 and 2023 is as follows:
| December 31, 2024 | December 31, 2023
Cost | (in thousands)
Customer relationships | $ | 4,129,501 |  | $ | 4,090,393 |
Order backlog | 543,933 |  | 541,302 |
Trade names & brands | 204,588 |  | 204,653 |
Patient database | 170,324 |  | 170,366 |
Technology assets | 150,658 |  | 141,257 |
Total cost | 5,199,004 |  | 5,147,971 |
Accumulated amortization | (1,639,212) |  | (1,292,106) |
Net book value | $ | 3,559,792 |  | $ | 3,855,865 |
Schedule of Future Intangible Asset Amortization Expense | Future intangible asset amortization expense for the years ended December 31, 2025 to December 31, 2029 is as follows:
(in thousands)
2025 | $ | 235,011 |
2026 | 220,771 |
2027 | 208,448 |
2028 | 195,447 |
2029 | 180,201 |
Total | $ | 1,039,878 |

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