EMPLOYEE BENEFIT PLAN - Components of net periodic benefit cost (Details) - Retirement Income Plan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 243	$ 247
Expected return on plan assets		(377)
Amortization of net losses	253	202
Net periodic benefit cost	$ 496	$ 72