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RETIREMENT PLANS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Retirement Benefits [Abstract] |  |  |
Net periodic benefit costs | $ 0.4 | $ 0.3 |
Service cost component | 0.8 | $ 0.5 |
Estimated fair value of plan assets | $ 40.4 |  | $ 45.7
Defer payment and taxation, base salary, percentage (up to) | 75.00% |  |
Defer payment and taxation, bonus and other eligible cash compensation, percentage (up to) | 100.00% |  |
Deferred compensation plan, fair value of assets | $ 5.7 |  | $ 6.1

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