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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of significant unobservable inputs of level 3 financial assets and liabilities (Details) $ in Thousands | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value | $ 229,199 | $ 532,419
Total assets measured at fair value | 811,925 | 1,524,874
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 | 5,304 | 5,835
Contingent consideration | 29,303 | 27,986
Total liabilities measured at fair value | 39,372 | 42,421
Significant unobservable inputs (Level 3) |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value | 229,199 | 532,419
Total assets measured at fair value | 632,168 | 1,268,057
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 | 5,304 | 5,835
Contingent consideration | 29,303 |
Total liabilities measured at fair value | $ 34,607 | $ 33,820
Significant unobservable inputs (Level 3) | Market interest rate |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.085 | 0.085
Significant unobservable inputs (Level 3) | Weighted Average | Market interest rate |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.085 | 0.085
Significant unobservable inputs (Level 3) | Market approach |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value | $ 393,630 | $ 662,158
Fair value | 40,017 | 19,897
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 | $ 5,304 | $ 5,835
Significant unobservable inputs (Level 3) | Market approach | Operating income multiple |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Mandatorily redeemable noncontrolling interesting, measurement input | 6.0 | 6.0
Significant unobservable inputs (Level 3) | Market approach | Minimum | Multiple of EBITDA |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 4.8 | 0.7
Significant unobservable inputs (Level 3) | Market approach | Minimum | Multiple of Sales |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 0.7 | 0.8
Loans receivable at fair value, measurement input | 0.7 |
Significant unobservable inputs (Level 3) | Market approach | Minimum | Market price of related security |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 0.02 | 0.04
Loans receivable at fair value, measurement input | 16.57 | 19.87
Significant unobservable inputs (Level 3) | Market approach | Maximum | Multiple of EBITDA |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 9.0 | 13.5
Significant unobservable inputs (Level 3) | Market approach | Maximum | Multiple of Sales |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 3.5 | 3.8
Significant unobservable inputs (Level 3) | Market approach | Maximum | Market price of related security |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 11.35 | 92.51
Significant unobservable inputs (Level 3) | Market approach | Weighted Average | Multiple of EBITDA |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 8.2 | 7.1
Significant unobservable inputs (Level 3) | Market approach | Weighted Average | Multiple of Sales |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 1.0 | 1.0
Loans receivable at fair value, measurement input | 0.7 |
Significant unobservable inputs (Level 3) | Market approach | Weighted Average | Market price of related security |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 11.20 | 12.27
Loans receivable at fair value, measurement input | 16.57 | 19.87
Significant unobservable inputs (Level 3) | Market approach | Weighted Average | Operating income multiple |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Mandatorily redeemable noncontrolling interesting, measurement input | 6.0 | 6.0
Significant unobservable inputs (Level 3) | Discounted cash flow |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value |  | $ 58,331
Fair value | $ 189,182 | 512,522
Contingent consideration | $ 29,303 | $ 27,985
Significant unobservable inputs (Level 3) | Discounted cash flow | EBITDA volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent |  | 0.700
Significant unobservable inputs (Level 3) | Discounted cash flow | Asset volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.690 | 0.690
Significant unobservable inputs (Level 3) | Discounted cash flow | Revenue volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent |  | 0.051
Significant unobservable inputs (Level 3) | Discounted cash flow | Minimum | Market interest rate |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input |  | 0.202
Loans receivable at fair value, measurement input | 0.139 | 0.100
Significant unobservable inputs (Level 3) | Discounted cash flow | Minimum | Revenue volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.050 |
Significant unobservable inputs (Level 3) | Discounted cash flow | Maximum | Market interest rate |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input |  | 0.570
Loans receivable at fair value, measurement input | 0.610 | 0.416
Significant unobservable inputs (Level 3) | Discounted cash flow | Maximum | Revenue volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.063 |
Significant unobservable inputs (Level 3) | Discounted cash flow | Weighted Average | Market interest rate |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input |  | 0.246
Loans receivable at fair value, measurement input | 0.264 | 0.171
Significant unobservable inputs (Level 3) | Discounted cash flow | Weighted Average | EBITDA volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent |  | 0.700
Significant unobservable inputs (Level 3) | Discounted cash flow | Weighted Average | Asset volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.690 | 0.690
Significant unobservable inputs (Level 3) | Discounted cash flow | Weighted Average | Revenue volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Contingent earnout, measurement input, percent | 0.056 | 0.051
Significant unobservable inputs (Level 3) | Option pricing model |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value | $ 9,339 | $ 15,149
Significant unobservable inputs (Level 3) | Option pricing model | Minimum | Annualized volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 0.300 | 0.250
Significant unobservable inputs (Level 3) | Option pricing model | Maximum | Annualized volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 1.300 | 1.870
Significant unobservable inputs (Level 3) | Option pricing model | Weighted Average | Annualized volatility |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Equity securities, measurement input | 0.830 | 0.750

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