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RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Related Party Transaction Line Items
Sales Revenue Services Net	$ 633,286	$ 588,726
Airmax [Member]
Related Party Transaction Line Items
Purchases from Related Party	300	100
Accounts Payable Due from Related Party	143
Willis Towers Watson [Member]
Related Party Transaction Line Items
Purchases from Related Party	$ 800	$ 800

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