Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities - Unrealized Gain (Losses) On Marketable Investment Securities (Details) - USD ($)
$ in Thousands |
Jun. 30, 2016 |
Dec. 31, 2015 |
| Components of our available-for-sale investments |
|
|
| Debt securities |
$ 220,028
|
$ 640,191
|
| Debt securities |
137,929
|
557,911
|
| Total marketable investment securities |
220,028
|
640,191
|
| Unrealized Gains (Losses) on Marketable Investment Securities |
|
|
| Unrealized Gains |
5,722
|
98,196
|
| Unrealized Losses |
(1,947)
|
(673)
|
| Unrealized Gains Losses, Net |
3,775
|
97,523
|
| Contractual maturities of restricted and non-restricted marketable investment securities |
|
|
| Debt securities with contractual maturities within one year |
162,000
|
|
| Debt securities with contractual maturities extending longer than one year through and including five years |
32,000
|
|
| Debt securities with contractual maturities longer than ten years |
15,000
|
|
| Accumulated net unrealized gains (losses) |
|
|
| Accumulated net unrealized gains, before tax, in accumulated other comprehensive income (loss) |
4,000
|
98,000
|
| Accumulated net unrealized gains, net of tax, in accumulated other comprehensive income (loss) |
2,000
|
62,000
|
| US Treasury and agency securities |
|
|
| Components of our available-for-sale investments |
|
|
| Debt securities |
82,290
|
82,124
|
| Unrealized Gains (Losses) on Marketable Investment Securities |
|
|
| Unrealized Gains |
118
|
2
|
| Unrealized Losses |
|
(135)
|
| Unrealized Gains Losses, Net |
118
|
(133)
|
| Corporate securities |
|
|
| Components of our available-for-sale investments |
|
|
| Debt securities |
125,282
|
349,897
|
| Unrealized Gains (Losses) on Marketable Investment Securities |
|
|
| Unrealized Gains |
5,536
|
29,370
|
| Unrealized Losses |
(4)
|
(480)
|
| Unrealized Gains Losses, Net |
5,532
|
28,890
|
| Other (including restricted) |
|
|
| Components of our available-for-sale investments |
|
|
| Debt securities |
1,184
|
47,847
|
| Unrealized Gains (Losses) on Marketable Investment Securities |
|
|
| Unrealized Gains |
68
|
73
|
| Unrealized Losses |
(11)
|
(17)
|
| Unrealized Gains Losses, Net |
57
|
56
|
| Equity securities |
|
|
| Components of our available-for-sale investments |
|
|
| Equity securities |
11,272
|
160,323
|
| Unrealized Gains (Losses) on Marketable Investment Securities |
|
|
| Unrealized Gains |
|
68,751
|
| Unrealized Losses |
(1,932)
|
(41)
|
| Unrealized Gains Losses, Net |
$ (1,932)
|
$ 68,710
|