GOODWILL - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Goodwill [Roll Forward]
Beginning balance	$ 393,575	$ 394,898
Foreign currency translation adjustments	528	(800)
Ending balance	394,103	394,098
Financial Advisory
Goodwill [Roll Forward]
Beginning balance	312,305	313,628
Foreign currency translation adjustments	528	(800)
Ending balance	312,833	312,828
Asset Management
Goodwill [Roll Forward]
Beginning balance	81,270	81,270
Foreign currency translation adjustments	0	0
Ending balance	$ 81,270	$ 81,270