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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2023
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 March 31, 2023:
| Carrying Amount |  | Fair Value
| (Dollars in thousands)
Assets: |  |  |
Cash and cash equivalents | $ | 501,060 |  |  | $ | 501,060 |
Liabilities: |  |  |
Bank debt | $ | 1,756,840 |  |  | $ | 1,756,840 |
3¼% Senior Notes | 706,160 |  |  | 689,558 |
4⅛% Senior Notes | 599,346 |  |  | 564,720 |
2¼% Senior Notes | 543,200 |  |  | 459,971 |
1.4% Senior Secured Notes | 499,836 |  |  | 445,715 |

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