SEGMENT INFORMATION (Revenues by Customer Location) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,170,206	$ 1,194,861	$ 2,381,147	$ 2,366,475
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	649,622	686,952	1,329,059	1,343,979
United Kingdom
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	152,481	149,730	307,808	302,927
Switzerland
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	89,497	79,226	179,358	161,056
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	58,408	50,879	117,508	101,058
Germany
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	45,028	39,874	87,763	76,263
Canada
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	26,485	31,811	54,317	58,840
Russia
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	5,872	17,987	11,745	48,679
Other locations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 142,813	$ 138,402	$ 293,589	$ 273,673