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FAIR VALUE MEASUREMENTS (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
SERP
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair value of plan assets	$ 11,037,000	$ 12,264,000

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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