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RELATED PARTY TRANSACTIONS (NARRATIVE) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related Party Transaction Line Items |  |  |
Sales Revenue Services Net | $ 2,443,707 | $ 2,273,062 | $ 1,949,248
Airmax [Member] |  |  |
Related Party Transaction Line Items |  |  |
Purchases from Related Party | 500 | 600 | 400
Accounts Payable Due from Related Party | 111 |  |
Welltok |  |  |
Related Party Transaction Line Items |  |  |
Sales Revenue Services Net | 500 | 1,500 | $ 3,000
Unisys [Member] |  |  |
Related Party Transaction Line Items |  |  |
Sales Revenue Services Net | 100 | $ 400 |
Willis Towers Watson [Member] |  |  |
Related Party Transaction Line Items |  |  |
Purchases from Related Party | $ 1,700 |  |

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