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Financial Instruments (Tables)
 6 Months Ended
Jun. 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 June 30, 2024:
Carrying
Amount		Fair
Value
 (Dollars in thousands)
Assets:  
Cash and cash equivalents$302,795 $302,795 
Liabilities:  
Bank debt$1,569,277 $1,569,277 
3¼% Senior Notes696,605 690,482 
4⅛% Senior Notes599,500 566,964 
2¼% Senior Notes535,850 490,104 
1.4% Senior Secured Notes
499,903 463,610