RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Related Party Transaction Line Items
Sales Revenue Services Net	$ 604,250	$ 554,794	$ 1,192,976	$ 1,094,013
Airmax [Member]
Related Party Transaction Line Items
Purchases from Related Party			300	500
Accounts Payable Due from Related Party	$ 139		139
Welltok
Related Party Transaction Line Items
Sales Revenue Services Net			500	900
Unisys [Member]
Related Party Transaction Line Items
Sales Revenue Services Net			100	$ 300
Willis Towers Watson [Member]
Related Party Transaction Line Items
Purchases from Related Party			$ 800