RETIREMENT PLANS - Net Periodic Pension Cost - SERP (Details) - SERP liability adjustments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ (290)	$ (182)	$ (163)
Net amortization and other	(40)	(114)	(125)
Total net periodic pension earnings/(cost)	$ (331)	$ (296)	$ (288)