RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction Line Items
Sales Revenue Services Net	$ 2,443,707	$ 2,273,062	$ 1,949,248
Airmax [Member]
Related Party Transaction Line Items
Purchases from Related Party	500	600	400
Accounts Payable Due from Related Party	111
Welltok
Related Party Transaction Line Items
Sales Revenue Services Net	500	1,500	$ 3,000
Unisys [Member]
Related Party Transaction Line Items
Sales Revenue Services Net	100	$ 400
Willis Towers Watson [Member]
Related Party Transaction Line Items
Purchases from Related Party	$ 1,700