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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2025
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, 2025 and 2024:
| Three Months Ended September 30,
| 2025 |  | 2024
(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 | $ | 350 |  |  | $ | 384 |  |  | $ | 734 |  |  | $ | 1,271 |  |  | $ | (508) |  |  | $ | 763 |
Other Comprehensive Income Before Reclassifications, net of tax | — |  |  | 37 |  |  | 37 |  |  | — |  |  | 1,233 |  |  | 1,233 |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | (12) |  | (1) | (17) |  | (2) | (29) |  |  | (28) |  | (1) | 11 |  | (2) | (17) |
Total Other Comprehensive Income (Loss) | (12) |  |  | 20 |  |  | 8 |  |  | (28) |  |  | 1,244 |  |  | 1,216 |
Balance, End of Period | $ | 338 |  |  | $ | 404 |  |  | $ | 742 |  |  | $ | 1,243 |  |  | $ | 736 |  |  | $ | 1,979 |
| Nine Months Ended September 30,
| 2025 |  | 2024
(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 | $ | 373 |  |  | $ | 159 |  |  | $ | 532 |  |  | $ | 1,375 |  |  | $ | (227) |  |  | $ | 1,148 |
Other Comprehensive Income Before Reclassifications, net of tax | — |  |  | 272 |  |  | 272 |  |  | — |  |  | 989 |  |  | 989 |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | (35) |  | (1) | (27) |  | (2) | (62) |  |  | (132) |  | (1) | (26) |  | (2) | (158) |
Total Other Comprehensive Income (Loss) | (35) |  |  | 245 |  |  | 210 |  |  | (132) |  |  | 963 |  |  | 831 |
Balance, End of Period | $ | 338 |  |  | $ | 404 |  |  | $ | 742 |  |  | $ | 1,243 |  |  | $ | 736 |  |  | $ | 1,979 |
(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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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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