SEGMENT INFORMATION (Revenues by Customer Location) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,152,136	$ 1,226,920	$ 3,533,283	$ 3,593,395
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	652,757	715,314	1,981,816	2,059,293
United Kingdom
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	140,718	160,683	448,526	463,610
Switzerland
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	91,504	76,191	270,862	237,247
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	59,020	56,996	176,528	158,054
Germany
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	44,843	40,116	132,606	116,379
Canada
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	21,808	29,145	76,125	87,985
Russia
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,545	8,013	13,290	56,692
Other locations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 139,941	$ 140,462	$ 433,530	$ 414,135