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Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost $ 5,109,212 $ 5,081,381
Accumulated amortization (830,553) (370,538)
  Net book value 4,278,659 4,710,843
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost 4,076,435 4,056,642
Order backlog    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost 536,934 528,022
Trade names & brands    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost 204,621 204,685
Patient database    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost 170,238 170,525
Technology assets    
Acquired Finite-Lived Intangible Assets [Line Items]    
Total cost $ 120,984 $ 121,507