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GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF GOODWILL (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Goodwill [Roll Forward] |  |
Beginning balance January 1 | $ 3,208,333 | $ 3,187,169
Ending balance December 31 | 3,240,931 | 3,208,333
Goodwill, Acquired During Period | 97,426 | 13,942
Goodwill, Foreign Currency Translation Gain (Loss) | (64,828) | 7,222
EES |  |
Goodwill [Roll Forward] |  |
Beginning balance January 1 | 860,958 | 853,456
Ending balance December 31 | 825,499 | 860,958
Goodwill, Acquired During Period | 0 | 1,124
Goodwill, Foreign Currency Translation Gain (Loss) | (35,459) | 6,378
UBS |  |
Goodwill [Roll Forward] |  |
Beginning balance January 1 | 1,225,663 | 1,218,213
Ending balance December 31 | 1,206,535 | 1,225,663
Goodwill, Acquired During Period | 0 | 4,215
Goodwill, Foreign Currency Translation Gain (Loss) | (19,128) | 3,235
CSS |  |
Goodwill [Roll Forward] |  |
Beginning balance January 1 | 1,121,712 | 1,115,500
Ending balance December 31 | 1,208,897 | 1,121,712
Goodwill, Acquired During Period | 97,426 | 8,603
Goodwill, Foreign Currency Translation Gain (Loss) | $ (10,241) | $ (2,391)

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