Investments in Equity Securities (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | $ 1,867,838 | $ 1,533,517 |
| Charter | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | 1,858,883 | 1,526,984 |
| Other investments | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Investments in equity securities | $ 8,955 | $ 6,533 |
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- Definition Equity Securities, Noncurrent No definition available.
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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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