Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Accounts Payable, Current	$ 82,259		$ 82,259		$ 96,577
Revenue from Contract with Customer, Excluding Assessed Tax	529,427	$ 602,956	1,640,150	$ 1,836,636
Affiliated Entity [Member] \| Avion and Airmax [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party			300	800
Accounts Payable, Current	$ 36		36
Affiliated Entity [Member] \| Willis Towers Watson [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Purchases from Related Party			$ 2,300	$ 2,800
Chief Executive Officer [Member] \| Avion and Airmax [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	100.00%		100.00%