SEGMENT INFORMATION (Revenues by Customer Location) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,210,941	$ 1,171,614
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	679,437	657,027
United Kingdom
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	155,327	153,197
Switzerland
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	89,861	81,830
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	59,100	50,179
Germany
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	42,735	36,389
Canada
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	27,832	27,029
Russia
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	5,873	30,692
Other locations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 150,776	$ 135,271