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v3.26.1

Pension and Other Benefit Programs (Tables) | 6 Months Ended
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Jun. 30, 2026
Pension and Other Benefit Programs |
Schedule of pension obligations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30 | ​ | Six Months Ended June 30
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025 | ​ | 2026 | ​ ​ ​ | 2025
Component of net periodic pension costs: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | $ | 27,927 | ​ | $ | 41,405 | ​ | $ | 55,368 | ​ | $ | 79,399
Interest cost | ​ | ​ | 4,527 | ​ | ​ | 3,269 | ​ | ​ | 9,470 | ​ | ​ | 6,268
Expected return on plan assets | ​ | ​ | (3,516) | ​ | ​ | (3,368) | ​ | ​ | (7,395) | ​ | ​ | (6,458)
Amortization of losses | ​ | ​ | 5 | ​ | ​ | 5,919 | ​ | ​ | 13 | ​ | ​ | 11,350
Amortization of prior service credit | ​ | ​ | (1,352) | ​ | ​ | (749) | ​ | ​ | (2,141) | ​ | ​ | (1,436)
Total | ​ | $ | 27,591 | ​ | $ | 46,476 | ​ | $ | 55,315 | ​ | $ | 89,123

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