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Financial Instruments (Tables)
 9 Months Ended
Sep. 30, 2024
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 September 30, 2024:
Carrying
Amount		Fair
Value
 (Dollars in thousands)
Assets:  
Cash and cash equivalents$368,507 $368,507 
Liabilities:  
Bank debt$1,398,127 $1,398,127 
3¼% Senior Notes725,400 723,949 
4⅛% Senior Notes599,532 585,354 
2¼% Senior Notes558,000 524,609 
1.4% Senior Secured Notes
499,916 474,235