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Comprehensive Income - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Amortization of defined benefit pension items    
Prior service cost $ 5 $ 5
Actuarial losses 94 129
Total before tax 99 134
Tax benefit [1] (26) (35)
Net of tax $ 73 $ 99
[1] These amounts were included in the computation of pension expense. See Note 7 for additional details.