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v3.26.1

Accumulated Other Comprehensive Loss - Changes to Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Beginning balance | $ 1,545,495 | $ 1,649,497
Ending balance | 1,498,819 | 1,613,710
Employee benefit costs |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |
Beginning balance | (60,433) | (50,082)
Other comprehensive income (loss) before reclassifications | 1,819 | (1,312)
Amounts reclassified from accumulated other comprehensive loss | 3,427 | 2,207
Ending balance | $ (55,187) | $ (49,187)

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