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Defined Benefit Plans - Net Periodic Pension Costs (Details) - Pension Plans, Defined Benefit [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service costs $ 130 $ 120 $ 260 $ 240
Interest costs 330 310 660 630
Expected return on plan assets (510) (520) (1,020) (1,050)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment 0 1,020 0 1,020
Amortization of net (gain)/loss 40 40 90 70
Net periodic benefit cost (income) $ (10) $ 970 $ (10) $ 910