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ACCRUED EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2023
Payables and Accruals [Abstract] |
Schedule of Accrued Expenses | Accrued expenses consisted of the following at December 31 (in thousands):
| 2023 |  | 2022
Employee compensation and benefits | $ | 75,822 |  |  | $ | 71,197 |
Project related reimbursable expenses | 205,864 |  |  | 128,416 |
Other | 11,275 |  |  | 10,512 |
Total accrued expenses | $ | 292,961 |  |  | $ | 210,125 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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