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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cost basis of AFS |  |  | $ 6.7
Deferred compensation plan |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Cost basis of investment funds | $ 84.8 | $ 82.7 | 78.1
Fair Value Measurements on a Recurring Basis | Deferred compensation plan |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan | 99.2 | 98.6 | 90.7
Fair Value Measured at Net Asset Value Per Share | Fair Value Measurements on a Recurring Basis | Deferred compensation plan |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Deferred compensation plan | $ 6.9 | $ 7.0 | $ 6.6

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