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Intangible assets (Tables) | 3 Months Ended
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Mar. 31, 2025
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
Patient database | 7 years
Technology assets | 5 years
The carrying amount of Intangible Assets as of March 31, 2025 and December 31, 2024 is as follows:
| March 31, 2025 | December 31, 2024
| (in thousands)
Cost |  |
Customer relationships | $ | 4,131,176 |  | $ | 4,129,501 |
Order backlog | 544,618 |  | 543,933 |
Trade names & brands | 204,631 |  | 204,588 |
Patient database | 170,409 |  | 170,324 |
Technology assets | 151,010 |  | 150,658 |
Total cost | 5,201,844 |  | 5,199,004 |
Accumulated amortization | (1,700,537) |  | (1,639,212) |
Net book value | $ | 3,501,307 |  | $ | 3,559,792 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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