ENTITY WIDE DISCLOSURES - Summary of Property and Equipment, Net by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property and equipment, net:
Property and equipment, net	$ 120,589	$ 109,849
United States
Property and equipment, net:
Property and equipment, net	77,850	81,217
Europe, Belgium
Property and equipment, net:
Property and equipment, net	18,190	11,778
Europe, Other
Property and equipment, net:
Property and equipment, net	8,772	9,294
Total Europe
Property and equipment, net:
Property and equipment, net	26,962	21,072
Asia-Pacific
Property and equipment, net:
Property and equipment, net	14,472	6,223
Other
Property and equipment, net:
Property and equipment, net	$ 1,305	$ 1,337