| Restricted Cash And Investments |
Restricted cash and investments consisted of the following at December 31, 2017 and 2016 (in thousands): | | | | | | | | | | | | 2017 | | 2016 | Restricted cash | | $ | 50,822 |
| | $ | 31,381 |
| Restricted investments | | 373,961 |
| | 339,926 |
| Total restricted cash and investments (1) | | $ | 424,783 |
| | $ | 371,307 |
|
—————————— | | (1) | There was an additional $11.1 million and $37.2 million of restricted cash included within “Prepaid expenses and other current assets” at December 31, 2017 and 2016, respectively. |
|
| Restricted Available For Sale Securities |
The following tables summarize the unrealized gains and losses related to our restricted investments, by major security type, as of December 31, 2017 and 2016 (in thousands): | | | | | | | | | | | | | | | | | | | | As of December 31, 2017 | | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Fair Value | Foreign government obligations | | $ | 127,436 |
| | $ | 62,483 |
| | $ | — |
| | $ | 189,919 |
| U.S. government obligations | | 174,624 |
| | 12,944 |
| | 3,526 |
| | 184,042 |
| Total | | $ | 302,060 |
| | $ | 75,427 |
| | $ | 3,526 |
| | $ | 373,961 |
|
| | | | | | | | | | | | | | | | | | | | As of December 31, 2016 | | | Amortized Cost | | Unrealized Gains | | Unrealized Losses | | Fair Value | Foreign government obligations | | $ | 107,604 |
| | $ | 62,350 |
| | $ | — |
| | $ | 169,954 |
| U.S. government obligations | | 169,294 |
| | 10,468 |
| | 9,790 |
| | 169,972 |
| Total | | $ | 276,898 |
| | $ | 72,818 |
| | $ | 9,790 |
| | $ | 339,926 |
|
|