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CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables) | 3 Months Ended
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Mar. 31, 2015
Cash and Cash Equivalents [Abstract] |
Schedule of Cash, Cash Equivalents and Investments | Investments as of March 31, 2015 and December 31, 2014 consisted of the following (in thousands):
|  | Amortized |  | Unrealized |  | Aggregate Fair
Investment Classification |  | Cost |  | Gains |  | (Losses) |  | Market Value
March 31, 2015 |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 11,485 |  |  | $ | 12 |  |  | $ | (5 | ) |  | $ | 11,492 |
Corporate bonds |  | 189,903 |  |  | 9 |  |  | (29 | ) |  | 189,883 |
U.S. Government bonds |  | 5,999 |  |  | — |  |  | (1 | ) |  | 5,998 |
|  | $ | 207,387 |  |  | $ | 21 |  |  | $ | (35 | ) |  | $ | 207,373 |
December 31, 2014 |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 11,373 |  |  | $ | 4 |  |  | $ | (13 | ) |  | $ | 11,364 |
Corporate bonds |  | 228,799 |  |  | 14 |  |  | (41 | ) |  | 228,772 |
U.S. Government bonds |  | 5,999 |  |  | — |  |  | — |  |  | 5,999 |
|  | $ | 246,171 |  |  | $ | 18 |  |  | $ | (54 | ) |  | $ | 246,135 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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