RETIREMENT AND POSTRETIREMENT PLANS - Major assumptions utilized to determine the net periodic cost of the Employee Retirement Plan (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Plans [Member]
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate used for net periodic benefit cost	2.69%
Discount rate used to determine benefit obligation at period end	2.69%
Expected long-term return on plan assets used for net periodic benefit cost	7.25%
Expected long-term return on plan assets used to determine benefit obligation at period end	7.25%
Employee Retirement Plan
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate used for net periodic benefit cost	2.55%	2.97%	4.04%
Discount rate used to determine benefit obligation at period end	2.55%	2.15%	2.97%
Expected long-term return on plan assets used for net periodic benefit cost	7.00%	7.00%	7.00%
Expected long-term return on plan assets used to determine benefit obligation at period end	7.00%	7.00%	7.00%
RETIREMENT PLANS | Board Member Retirement Plan
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate used for net periodic benefit cost		2.60%	3.80%
Discount rate used to determine benefit obligation at period end		1.55%	2.60%
RETIREMENT PLANS | Outside Director Retirement Plan [Member]
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate used for net periodic benefit cost		2.68%	3.84%
Discount rate used to determine benefit obligation at period end		1.69%	2.68%
POSTRETIREMENT PLANS
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate used for net periodic benefit cost		2.69%	3.82%
Discount rate used to determine benefit obligation at period end		0.29%	2.69%