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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 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Retirement Benefits [Abstract]        
Service cost $ 2,334 $ 2,334 $ 4,684 $ 4,759
Interest cost 1,072 637 2,147 1,262
Expected return on plan assets (2,700) (2,747) (5,400) (5,497)
Amortization of prior service cost 1 (75) 1 (150)
Defined Benefit Plan, Amortization of Gain (Loss) 170 405 320 805
Net periodic benefit cost (income) $ 877 $ 554 $ 1,752 $ 1,179