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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% |  |

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