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Comprehensive Income - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Amortization of defined benefit pension items |  |  |  |  |
Prior service cost |  | $ 5 | $ 5 | $ 10 | $ 10
Actuarial losses |  | 94 | 109 | 188 | 238
Total before tax |  | 99 | 114 | 198 | 248
Tax benefit | [1] | (26) | (30) | (52) | (65)
Net current period other comprehensive (loss) income |  | $ 73 | $ 84 | $ 146 | $ 183
[1] | These amounts were included in the computation of pension expense. See Note 7 for additional details.

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