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RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |  |  |
Accounts Payable, Current | $ 71,623 |  | $ 71,623 |  | $ 84,180
Revenue from Contract with Customer, Excluding Assessed Tax | 513,571 | $ 534,085 | 1,047,799 | $ 1,110,723 |
Affiliated Entity [Member] | Avion and Airmax [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Purchases from Related Party |  |  | 300 | 200 |
Accounts Payable, Current | $ 138 |  | $ 138 |  |
Affiliated Entity [Member] | Willis Towers Watson [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related Party Transaction, Purchases from Related Party |  |  |  | $ 1,500 |
Chief Executive Officer [Member] | Avion and Airmax [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 100.00% |  | 100.00% |  |

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