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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) | The following presents the changes in accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2023 and 2022:
| Three Months Ended September 30,
| 2023 |  | 2022
(in thousands) | Pension and Other Postretirement Benefits |  | Net Unrealized Gains (Losses) on Available-for-Sale Securities |  | Total |  | Pension and Other Postretirement Benefits |  | Net Unrealized Gains (Losses) on Available-for-Sale Securities |  | Total
Balance, Beginning of Period | $ | 1,281 |  |  | $ | (400) |  |  | $ | 881 |  |  | $ | (6,621) |  |  | $ | (292) |  |  | $ | (6,913) |
Other Comprehensive Loss Before Reclassifications, net of tax | (275) |  |  | (17) |  |  | (292) |  |  | — |  |  | (172) |  |  | (172) |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | 585 |  | (1) | — |  | (2) | 585 |  |  | 106 |  | (1) | 1 |  | (2) | 107 |
Total Other Comprehensive Income (Loss) | 310 |  |  | (17) |  |  | 293 |  |  | 106 |  |  | (171) |  |  | (65) |
Balance, End of Period | $ | 1,591 |  |  | $ | (417) |  |  | $ | 1,174 |  |  | $ | (6,515) |  |  | $ | (463) |  |  | $ | (6,978) |
| Nine Months Ended September 30,
| 2023 |  | 2022
(in thousands) | Pension and Other Postretirement Benefits |  | Net Unrealized Gains (Losses) on Available-for-Sale Securities |  | Total |  | Pension and Other Postretirement Benefits |  | Net Unrealized Gains (Losses) on Available-for-Sale Securities |  | Total
Balance, Beginning of Period | $ | 1,334 |  |  | $ | (419) |  |  | $ | 915 |  |  | $ | (6,537) |  |  | $ | 13 |  |  | $ | (6,524) |
Other Comprehensive Income (Loss) Before Reclassifications, net of tax | (275) |  |  | 1 |  |  | (274) |  |  | — |  |  | (477) |  |  | (477) |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | 532 |  | (1) | 1 |  | (2) | 533 |  |  | 22 |  | (1) | 1 |  | (2) | 23 |
Total Other Comprehensive Income (Loss) | 257 |  |  | 2 |  |  | 259 |  |  | 22 |  |  | (476) |  |  | (454) |
Balance, End of Period | $ | 1,591 |  |  | $ | (417) |  |  | $ | 1,174 |  |  | $ | (6,515) |  |  | $ | (463) |  |  | $ | (6,978) |
(1) Included in the computation of net periodic pension and other postretirement benefit costs. See Note 7. |  |  |  |  |  |
(2) Included in other income (expense), net on the accompanying consolidated statements of income. |  |  |  |  |  |

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