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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2020
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, 2020:
| Carrying Amount |  | Fair Value
| (Dollars in thousands) |  |
Assets: |  |  |
Cash and cash equivalents | $ | 614,846 |  |  | $ | 614,846 |
Liabilities: |  |  |
Bank debt | $ | 856,239 |  |  | $ | 856,239 |
4¾% Notes | 300,000 |  |  | 289,500 |
3¼% Notes | 713,490 |  |  | 699,263 |
4⅛% Notes | 599,009 |  |  | 553,500 |
2¼% Notes | 548,839 |  |  | 489,015 |
Derivative instruments (accrued and other liabilities) | 7,396 |  |  | 7,396 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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