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RETIREMENT PLANS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Retirement Benefits [Abstract] |  |  |  |  |
Net periodic benefit costs | $ 0.3 | $ 0.3 | $ 0.9 | $ 0.8 |
Service cost component | 0.5 | $ 0.6 | 1.6 | $ 1.9 |
Estimated fair value of plan assets | 38.2 |  | $ 38.2 |  | $ 38.1
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 | $ 5.4 |  | $ 5.4 |  | $ 4.7

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