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Investment in Charter Accounted for Using the Equity Method (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
May 23, 2015 | Apr. 30, 2021 | Mar. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Investments in affiliates accounted for using the Equity Method |  |  |  |  |
Carrying value of equity method investment |  |  | $ 15,735,671 | $ 15,735,671 |
Charter |  |  |  |  |
Investments in affiliates accounted for using the Equity Method |  |  |  |  |
Carrying value of equity method investment |  |  | 15,734,862 | 15,734,862 | $ 16,178,939
Market value of equity method investment |  |  | $ 36,177,000 | $ 36,177,000 |
Ownership capped percentage |  |  |  | 25.01% |
Fully diluted ownership percentage | 26.00% |  |  |  |
Ownership percentage |  |  | 31.10% | 31.10% |
Voting interest cap |  |  |  | 25.01% |
Proceeds from sale of equity method investments |  |  | $ 518,400 |  |
Charter | Liberty Broadband |  |  |  |  |
Investments in affiliates accounted for using the Equity Method |  |  |  |  |
Fully diluted ownership percentage |  |  | 26.00% |  |
Series A common stock | Charter |  |  |  |  |
Investments in affiliates accounted for using the Equity Method |  |  |  |  |
Equity investment shares sold |  |  | 834,576 |  |
Series A common stock | Charter | Subsequent event |  |  |  |  |
Investments in affiliates accounted for using the Equity Method |  |  |  |  |
Equity investment shares sold |  | 735,209 |  |  |
Proceeds from sale of equity method investments |  | $ 459,700 |  |  |

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