RETIREMENT PLANS - Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Pension Plan
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss	$ (166)	$ 259
Recognition of net actuarial loss	(67)	(47)
Total changes	(233)	212
Changes, net of taxes	(168)	154
SERP liability adjustments
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net (gain) loss	167	(1,315)
Recognition of net actuarial loss	(40)	(115)
Total changes	127	(1,430)
Changes, net of taxes	$ 91	$ (1,029)

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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