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Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2025
Investments, All Other Investments [Abstract]  
Summary of Carrying Amounts and Estimated Fair Values of Other Financial Instruments The following table summarizes the carrying amounts and estimated fair values of our other financial instruments at June 30, 2025:
Carrying
Amount		Fair
Value
 (Dollars in thousands)
Assets:  
Cash and cash equivalents$317,462 $317,462 
Liabilities:  
Bank debt$3,335,532 $3,335,532 
4⅛% Senior Notes599,629 589,818 
2¼% Senior Notes586,900 568,677 
1.4% Senior Secured Notes
499,957 486,515