XML 123 R110.htm IDEA: XBRL DOCUMENT v3.24.0.1
RETIREMENT PLANS - Schedule of post-retirement health benefit expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure      
Service cost $ 628 $ 1,190 $ 1,355
Interest cost 3,824 2,826 2,632
Net periodic pension cost 1,325 365 1,346
Net loss (gain) during the period (1,761) (5,323) (5,883)
Amortization of prior service cost     (1)
Total recognized in other comprehensive (income) loss (2,513) (6,582) (7,956)
Total recognized net periodic pension cost and other comprehensive income (1,188) (6,217) (6,610)
Postretirement Health Coverage      
Defined Benefit Plan Disclosure      
Service cost 21 34 43
Interest cost 153 111 103
Amortization of net actuarial loss (gain) 53 0 0
Net periodic pension cost 121 145 146
Net loss (gain) during the period 34 (758) (53)
Amortization of prior service cost 53 0 0
Total recognized in other comprehensive (income) loss 87 (758) (53)
Total recognized net periodic pension cost and other comprehensive income $ 208 $ (613) $ 93