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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Items Included in Accumulated Other Comprehensive Income (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Pension Plan [Member]    
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS    
Prior service cost $ 0 $ 0
Net actuarial loss (gain) 182,000 277,000
Total 182,000 277,000
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year 8,000  
Defined Benefit Plan, Accumulated Benefit Obligation 1,128,000 1,101,000
Other Postretirement Benefits Plan [Member]    
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS    
Prior service cost (186,000) (217,000)
Net actuarial loss (gain) (271,000) (211,000)
Total (457,000) $ (428,000)
Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year 9,000  
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year $ 31,000