Investments in Equity Securities (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Dec. 31, 2019 |
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| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | $ 3,350,749 | $ 2,605,293 |
| Other investments | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | 5,285 | 6,040 |
| Charter | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | $ 3,345,464 | $ 2,599,253 |
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI) and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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