v3.25.1
Accumulated Other Comprehensive Loss - Schedule of Components of Accumulated Other Comprehensive Loss, Net of Related Deferred Income Taxes (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax $ (1,559,018) $ (1,604,699) $ (1,430,316) $ (1,375,819)
Total accumulated other comprehensive loss, net of tax        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax (75,318) (73,747) $ (69,716) $ (73,922)
Defined benefit pension and other postretirement benefit plans        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax (79,503) (76,510)    
Unrealized foreign currency translation gain        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax 10,286 8,196    
Unrealized loss on interest rate swaps        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax (3,249) (2,793)    
Share of other comprehensive loss of equity method investments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total accumulated other comprehensive loss, net of tax $ (2,852) $ (2,640)