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SUPPLEMENTAL STOCKHOLDERS’ EQUITY INFORMATION - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other components of net periodic benefit costs $ 4,640 $ 1,050 $ 13,917 $ 3,124
Total reclassification, before tax (107,999) (85,043) (283,631) (227,781)
Income tax expense (26,352) (20,900) (69,488) (57,681)
Total reclassification, net of tax $ (81,647) $ (64,143) (214,143) $ (170,100)
Amounts reclassified from accumulated other comprehensive loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Total reclassification, before tax     13,217  
Income tax expense     3,472  
Total reclassification, net of tax     9,745  
Amounts reclassified from accumulated other comprehensive loss | Amortization of prior service credit        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other components of net periodic benefit costs     (1,458)  
Amounts reclassified from accumulated other comprehensive loss | Amortization of actuarial loss        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other components of net periodic benefit costs     $ 14,675