v3.26.1
Summary of significant accounting policies (Tables)
3 Months Ended
Mar. 31, 2026
Accounting Policies [Abstract]  
Schedule of Estimated Useful Lives
Intangible assets are amortized on a straight-line basis over their estimated useful lives, as set forth in the table below:

Estimated Useful Life
Customer relationships
8 - 23 years
Order backlog
3 - 5 years
Technology assets5 years
The carrying amount of intangible assets as of March 31, 2026 and December 31, 2025 is as follows:

March 31,
2026
December 31,
2025
(in thousands)
Cost
Customer relationships$4,133,727 $4,134,478 
Order backlog545,727 546,054 
Trade names & brands204,700 204,721 
Patient database170,484 170,511 
Technology assets151,582 151,754 
Total cost5,206,220 5,207,518 
Accumulated amortization(2,009,516)(1,873,663)
Impairment— (86,737)
Net book value$3,196,704 $3,247,118