EMPLOYEE BENEFIT PLANS - Employee benefit plan amounts recognized in the Consolidated Balance Sheets and Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Service cost	$ 2,425	$ 2,350
Interest cost	625	525
Expected return on plan assets	(2,750)	(2,550)
Amortization of prior service cost	(75)	(100)
Defined Benefit Plan, Amortization of Gain (Loss)	400	625
Net periodic benefit cost (income)	$ 625	$ 850