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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets | $ 162,133 | $ 143,499 |
Available-for-sale debt securities | 39,212 | 39,459 | $ 43,485
Deferred compensation plan liabilities | (162,133) | (143,499) |
Bank debt | (381,000) | (312,400) |
Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan assets | 162,133 | 143,499 |
Available-for-sale debt securities | 39,212 | 39,459 |
Other depository assets | 1,571 | 1,031 |
Deferred compensation plan liabilities | (162,133) | (143,499) |
Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Interest rate swaps | 4,890 | 3,999 |
Bank debt | (379,660) | (310,826) |
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Contingent purchase price liabilities | $ (83,839) | $ (114,946) |

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