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FAIR VALUE MEASUREMENTS - Schedule of Change in Level 3 Fair Values of Contingent Purchase Price Liabilities (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Net expense | $ 204 | $ 815 | $ 638 | $ 1,445
Cash settlement paid | $ 9,898 | $ 1,373 | $ 40,855 | $ 29,808
Shares issued (number) | 34 | 4 | 94 | 75
Contingent Purchase Price Liabilities | Level 3 |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance |  |  | $ (114,946) | $ (132,010)
Additions from business acquisitions |  |  | (15,184) | (30,317)
Settlement of contingent purchase price liabilities |  |  | 46,929 | 33,307
Change in fair value of contingencies |  |  | 423 | (15)
Change in net present value of contingencies |  |  | (1,061) | (1,430)
Ending balance | $ (83,839) | $ (130,465) | $ (83,839) | $ (130,465)

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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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