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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity [Abstract] |
Summary of Accumulated Other Comprehensive (Loss) | Following is a summary of AOCI(L) for 2024, 2023 and 2022:
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | December 31, 2023 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | December 31, 2024
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | $ | 533 |  |  | $ | 5,144 |  |  | $ | (1,259) |  |  | $ | — |  |  | $ | — |  |  | $ | 4,418 |
Prior service costs |  | (97) |  |  | — |  |  | — |  |  | 16 |  |  | (4) |  |  | (85) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | 721 |  |  | 2,920 |  |  | (715) |  |  | 44 |  |  | (10) |  |  | 2,960 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Unrealized gain on short-term investments |  | — |  |  | 33 |  |  | (8) |  |  | — |  |  | — |  |  | 25 |
Reclassification of stranded tax effects |  | (4,809) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,809) |
Total AOCI(L) |  | $ | (4,276) |  |  | $ | 8,097 |  |  | $ | (1,982) |  |  | $ | 60 |  |  | $ | (14) |  |  | $ | 1,885 |
As of both December 31, 2024 and December 31, 2023, there were no gross actuarial losses or prior service costs included in AOCI(L) associated with the Primary Plan, as the Primary Plan settlement was completed during 2023. All pension activity during 2024 was related to the Bargaining Plan.
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | December 31, 2022 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | December 31, 2023
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial loss |  | $ | (71,140) |  |  | $ | 3,036 |  |  | $ | (744) |  |  | $ | 1,946 |  |  | $ | (476) |  |  | $ | (67,378) |
Prior service costs |  | (105) |  |  | (5) |  |  | 1 |  |  | 16 |  |  | (4) |  |  | (97) |
Pension plan settlement |  | — |  |  | — |  |  | — |  |  | 112,796 |  |  | (44,885) |  |  | 67,911 |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  | 6,752 |  |  | (7,986) |  |  | 1,955 |  |  | — |  |  | — |  |  | 721 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Reclassification of stranded tax effects |  | (19,720) |  |  | — |  |  | — |  |  | — |  |  | 14,911 |  |  | (4,809) |
Total AOCI(L) |  | $ | (84,837) |  |  | $ | (4,955) |  |  | $ | 1,212 |  |  | $ | 114,758 |  |  | $ | (30,454) |  |  | $ | (4,276) |
|  |  |  | Gains (Losses) During the Period |  | Reclassification to Income |  |
(in thousands) |  | December 31, 2021 |  | Pre-tax Activity |  | Tax Effect |  | Pre-tax Activity |  | Tax Effect |  | December 31, 2022
Net pension activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial loss |  | $ | (78,882) |  |  | $ | 6,263 |  |  | $ | (1,533) |  |  | $ | 3,990 |  |  | $ | (978) |  |  | $ | (71,140) |
Prior service credits (costs) |  | 11 |  |  | (154) |  |  | 38 |  |  | — |  |  | — |  |  | (105) |
Net postretirement benefits activity: |  |  |  |  |  |  |  |  |  |  |  |
Actuarial (loss) gain |  | (1,239) |  |  | 10,138 |  |  | (2,481) |  |  | 444 |  |  | (110) |  |  | 6,752 |
Prior service costs |  | (624) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (624) |
Foreign currency translation adjustment |  | (9) |  |  | — |  |  | — |  |  | 11 |  |  | (2) |  |  | — |
Reclassification of stranded tax effects |  | (19,720) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (19,720) |
Total AOCI(L) |  | $ | (100,463) |  |  | $ | 16,247 |  |  | $ | (3,976) |  |  | $ | 4,445 |  |  | $ | (1,090) |  |  | $ | (84,837) |

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