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Goodwill
 12 Months Ended
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
The change in the carrying amount of Goodwill for the years ended December 31, 2022 and 2021 is as follows:
December 31, 2022December 31, 2021
 (in thousands)
Opening goodwill$9,037,931 $936,257 
Current year acquisitions (note 6)— 8,120,006 
Prior period acquisition (note 6)(35,692)— 
Foreign exchange movement(30,569)(18,332)
Closing goodwill$8,971,670 $9,037,931 

There were no goodwill impairment losses for the years ended December 31, 2022 and 2021.