Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities - Other Income Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Other Income (Expense) | ||||
| Marketable investment securities - gains (losses) on sales/exchanges | $ 29,868 | $ 34,927 | $ 108,521 | $ 99,907 |
| Derivative financial instruments - net realized and/or unrealized gains (losses) | 17,078 | 100,776 | 5,405 | 168,387 |
| Marketable investment securities - other-than-temporary impairments | (914) | (914) | (5,567) | |
| Other | (2,091) | (225) | (2,006) | (6,960) |
| Total | $ 43,941 | $ 135,478 | $ 111,006 | $ 255,767 |