RELATED PARTY TRANSACTIONS (NARRATIVE) (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
Related Party Transaction Line Items
Accounts payable, current, total	$ 87,115		$ 87,115		$ 96,577
Sales Revenue Services Net	534,085	$ 600,394	1,110,723	$ 1,233,680
Affiliated Entity | Avion and Airmax [Member]
Related Party Transaction Line Items
Purchases from Related Party			200	700
Accounts payable, current, total	$ 36		36
Affiliated Entity | Willis Towers Watson [Member]
Related Party Transaction Line Items
Purchases from Related Party			$ 1,500	$ 1,800
Chief Executive Officer | Avion and Airmax [Member]
Related Party Transaction Line Items
Equity Method Investment, Ownership Percentage	100.00%		100.00%