SEGMENT INFORMATION (REVENUE GEOGRAPHY) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 534,085	$ 600,394	$ 1,110,723	$ 1,233,680
Other long-term assets	99,859		99,859		$ 101,573
United States Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	354,607	414,854	741,599	858,890
Philippines Asia Pacific India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	108,728	115,740	229,194	237,779
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	42,188	36,023	81,031	70,477
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 28,562	$ 33,777	$ 58,899	$ 66,534