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RETIREMENT BENEFIT PLANS (Scheduled of Funded Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation Of Funded Status
Fair value of plan assets	$ 37,825	$ 30,770	$ 31,103
Benefit obligations	72,869	66,972	$ 52,542
Unfunded benefit obligations	$ 35,044	$ 36,202

X

- Definition

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

+ 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.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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