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EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS - Funded Status of Defined Benefit Plans (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Pension Plan [Member]    
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS    
Benefit obligation at beginning of year $ 1,101 $ 976
Service cost 0 0
Interest cost 20 23
Plan participants' contributions 0 0
Actuarial (gain) loss 12 108
Benefits paid (5) (6)
Benefit obligation at end of year 1,128 1,101
Fair value of plan assets at beginning of year 1,062 971
Actual return on plan assets 118 97
Employer contribution 0 0
Plan participants' contributions 0 0
Benefits paid (5) (6)
Fair value of plan assets at end of year 1,175 1,062
Funded status at end of year 47 (39)
Other Postretirement Benefits Plan [Member]    
EMPLOYEE AND POSTRETIREMENT BENEFIT PLANS    
Benefit obligation at beginning of year 1,347 1,326
Service cost 63 46
Interest cost 33 39
Plan participants' contributions 148 185
Actuarial (gain) loss (65) 11
Benefits paid (229) (260)
Benefit obligation at end of year 1,297 1,347
Fair value of plan assets at beginning of year 0 0
Actual return on plan assets 0 0
Employer contribution 81 75
Plan participants' contributions 148 185
Benefits paid (229) (260)
Fair value of plan assets at end of year 0 0
Funded status at end of year $ (1,297) $ (1,347)