RETIREMENT PLANS - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
May 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Retirement Benefits [Abstract]
Net periodic benefit costs		$ 0.6	$ 1.0
Service cost component		0.8	$ 0.9
Estimated fair value of plan assets		32.8		$ 37.8
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		$ 2.9

Defined Benefit Plan, Defer Payment And Taxation, Base Salary, Percentage

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- Definition

Defined Benefit Plan, Defer Payment And Taxation, Bonus And Other Compensation, Percentage

+ References

No definition available.

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

+ References

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

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