SEGMENT INFORMATION - Operating Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 679,965	$ 592,218
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	311,033	265,952
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	280,675	238,416
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	30,358	27,536
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	264,978	229,979
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	113,294	91,660
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	151,684	138,319
Total Asia & Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	103,954	96,287
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	26,573	26,017
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 77,381	$ 70,270