Available-For-Sale Securities Reported At Fair Value |
The following tables summarize, by major security type, the Company’s assets that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy: | | | | | | | | | | | | | | | | | | As of June 30, 2014 | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Estimated Fair Value | | (in thousands) | Cash | $ | 1,113,853 |
| | $ | — |
| | $ | — |
| | $ | 1,113,853 |
| Level 1 securities: | | | | | | | | Money market funds | 106,094 |
| | — |
| | — |
| | 106,094 |
| Level 2 securities: | | | | | | | | Corporate debt securities | 309,328 |
| | 1,266 |
| | (17 | ) | | 310,577 |
| Government securities | 163,871 |
| | 311 |
| | (1 | ) | | 164,181 |
| Asset backed securities | 1,534 |
| | 1 |
| | — |
| | 1,535 |
| Certificate of deposits and commercial paper | 23,828 |
| | — |
| | — |
| | 23,828 |
| Total (1) | $ | 1,718,508 |
| | $ | 1,578 |
| | $ | (18 | ) | | $ | 1,720,068 |
|
| | | | | | | | | | | | | | | | | | As of December 31, 2013 | | Amortized Cost | | Gross Unrealized Gains | | Gross Unrealized Losses | | Estimated Fair Value | | (in thousands) | Cash | $ | 483,959 |
| | $ | — |
| | $ | — |
| | $ | 483,959 |
| Level 1 securities: | | | | | | | | Money market funds | 126,208 |
| | — |
| | — |
| | 126,208 |
| Level 2 securities: | | | | | | | | Corporate debt securities | 316,465 |
| | 1,245 |
| | (654 | ) | | 317,056 |
| Government securities | 143,812 |
| | 287 |
| | (18 | ) | | 144,081 |
| Asset and mortgage-backed securities | 93,118 |
| | 229 |
| | (418 | ) | | 92,929 |
| Certificate of deposits | 23,425 |
| | — |
| | — |
| | 23,425 |
| Agency securities | 17,951 |
| | — |
| | (2 | ) | | 17,949 |
| Total (2) | $ | 1,204,938 |
| | $ | 1,761 |
| | $ | (1,092 | ) | | $ | 1,205,607 |
|
| | (1) | Includes $1,214.2 million that is included in cash and cash equivalents, $500.1 million included in short-term investments and $5.7 million of restricted cash that is included in other non-current assets related to workers compensation deposits. |
| | (2) | Includes $605.0 million that is included in cash and cash equivalents, $595.4 million included in short-term investments and $5.2 million of restricted cash that is included in other non-current assets related to workers compensation deposits. |
|