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Intangible assets (Tables) | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | Intangible assets are amortized on a straight-line basis over the expected useful life, as set forth in the table below:
| Estimated Useful Life
Customer relationships | 23 years
Order backlog | 3 years
Trade names | 3 years
Patient database | 7 years
Technology assets | 5 years
Intangible assets, net consisted of the following:
| Nine Months Ended | Year Ended
| September 30, 2023 | December 31, 2022
Cost | (in thousands)
Customer relationships | $ | 4,076,010 |  | $ | 4,076,435 |
Order backlog | 536,716 |  | 536,934 |
Trade names & brands | 204,608 |  | 204,621 |
Patient database | 170,262 |  | 170,238 |
Technology assets | 120,875 |  | 120,984 |
Total cost | 5,108,471 |  | 5,109,212 |
Accumulated amortization | (1,173,798) |  | (830,553) |
Net book value | $ | 3,934,673 |  | $ | 4,278,659 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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