EMPLOYEE BENEFIT PLANS - Postretirement (Details) - Postretirement benefit plans - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postretirement benefit plan disclosure
Assumed ultimate health care cost trend rate (as a percent)	3.00%
Accumulated benefit obligation after plan amendment	$ 9,961	$ 13,235
Amounts recognized in accumulated other comprehensive loss (pre-tax)
Net actuarial gain	(4,452)
Net amount recognized in accumulated other comprehensive loss	(4,452)
Changes in the accumulated postretirement benefit obligation
Benefit obligation, beginning of the period	13,235	13,487
Service cost	241	270	$ 288
Interest cost	336	291	403
Actuarial (gain)/loss	(3,323)	(326)
Benefits paid	(528)	(487)
Benefit obligation, end of the period	9,961	13,235	13,487
Net periodic postretirement benefit cost
Service cost-benefits attributed to service during the period	241	270	288
Interest cost on the accumulated postretirement benefit obligation	336	291	403
Net amortization	(826)	(1,405)	(1,349)
Net periodic postretirement benefit cost (income)	$ (249)	$ (844)	$ (658)

For defined benefit pension plans, the actuarial present value, after plan amendment, of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

No definition available.