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EMPLOYEE BENEFIT PLANS - Pre-tax amounts recognized in other comprehensive income (Details) - Retirement Income Plan - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
EMPLOYEE BENEFIT PLANS      
Net loss (gain) $ 549,000 $ 879,000 $ (154,000)
Amortization of net loss (113,000) (73,000) (98,000)
Settlement loss (1,180,000) 0 (647,000)
Amount recognized in accumulated other comprehensive income (loss) $ (744,000) $ 806,000 $ (899,000)