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Goodwill
3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
Three Months EndedYear Ended
March 31, 2022December 31, 2021
(in thousands)
Opening balance$9,037,931 $936,257 
Current period acquisitions (Note 7)— 8,120,006 
Prior period acquisitions1,462 — 
Foreign exchange movement(11,410)(18,332)
Closing balance$9,027,983 $9,037,931 
There are no accumulated impairment charges as of March 31, 2022 and December 31, 2021.