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SEGMENT INFORMATION (REVENUE GEOGRAPHY) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 600,394	$ 604,250	$ 1,233,680	$ 1,192,976
Other long-term assets	84,845		84,845		$ 67,734
United States Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	414,854	433,495	858,890	845,747
Philippines Asia Pacific India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	115,740	108,750	237,779	226,278
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	33,777	27,772	66,534	55,154
Europe Middle East Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales Revenue Services Net	$ 36,023	$ 34,233	$ 70,477	$ 65,797

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