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OVERVIEW AND BASIS OF PRESENTATION (NARRATIVE) (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 | Mar. 31, 2023 | Oct. 26, 2019
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |
Year Founded |  | 1982 |  |  |  |
Number Of Clients |  | 740 |  |  |  |
Number of Countries in which Entity Operates |  | 22 |  |  |  |
Number of employees |  | 54,000 |  |  |  |
Prior Period Reclassification Adjustment | $ 14,200,000 |  | $ 14,200,000 |  |  |
Percepta LLC |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |
ownership percentage |  | 55.00% |  |  |  |
FCR |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |
ownership percentage |  | 100.00% |  |  | 70.00% | 70.00%
Serendebyte |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |
ownership percentage |  | 100.00% |  | 70.00% |  |

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