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FAIR VALUE MEASUREMENTS - Fair Value of Financial Assets and Liabilities (Details) - USD ($) | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Measurements, Recurring |  |
Assets: |  |
Fair value of other non-current assets | $ 27,847,000 | $ 22,296,000
Fair value of financial assets, Total | 30,264,000 | 24,950,000
Liabilities: |  |
Fair value of other current liabilities |  | 18,579,000
Fair value of financial liabilities, Total | 27,881,000 | 38,446,000
Fair Value, Measurements, Recurring | NQDC Plan liability |  |
Liabilities: |  |
Fair value of other current liabilities | 2,417,000 | 2,654,000
Fair value of other non-current liabilities | 25,464,000 | 19,867,000
Fair Value, Measurements, Recurring | Contingent consideration |  |
Liabilities: |  |
Fair value of other current liabilities |  | 15,925,000
Fair Value, Measurements, Recurring | NQDC Plan assets |  |
Assets: |  |
Fair value of other current assets | 2,417,000 | 2,654,000
Fair value of other non-current assets | 25,464,000 | 19,867,000
Fair Value, Measurements, Recurring | Restricted Investments |  |
Assets: |  |
Fair value of other non-current assets | 2,383,000 | 2,429,000
Quoted Price in Active Markets For Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Financial assets remeasured | 0 | 0
Liabilities remeasured | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring |  |
Assets: |  |
Fair value of other non-current assets | 27,847,000 | 22,296,000
Fair value of financial assets, Total | 30,264,000 | 24,950,000
Liabilities: |  |
Fair value of other current liabilities |  | 2,654,000
Fair value of financial liabilities, Total | 27,881,000 | 22,521,000
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | NQDC Plan liability |  |
Liabilities: |  |
Fair value of other current liabilities | 2,417,000 | 2,654,000
Fair value of other non-current liabilities | 25,464,000 | 19,867,000
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Contingent consideration |  |
Liabilities: |  |
Fair value of other current liabilities |  | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | NQDC Plan assets |  |
Assets: |  |
Fair value of other current assets | 2,417,000 | 2,654,000
Fair value of other non-current assets | 25,464,000 | 19,867,000
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Restricted Investments |  |
Assets: |  |
Fair value of other non-current assets | 2,383,000 | 2,429,000
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |
Assets: |  |
Fair value of other non-current assets | 0 | 0
Fair value of financial assets, Total | 0 | 0
Liabilities: |  |
Fair value of other current liabilities |  | 15,925,000
Fair value of financial liabilities, Total | 0 | 15,925,000
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | NQDC Plan liability |  |
Liabilities: |  |
Fair value of other current liabilities | 0 | 0
Fair value of other non-current liabilities | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Contingent consideration |  |
Liabilities: |  |
Fair value of other current liabilities |  | 15,925,000
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | NQDC Plan assets |  |
Assets: |  |
Fair value of other current assets | 0 | 0
Fair value of other non-current assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring | Restricted Investments |  |
Assets: |  |
Fair value of other non-current assets | $ 0 | $ 0

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