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Cash, Cash Equivalents, and Investments (Tables) | 12 Months Ended
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Dec. 31, 2013
Cash And Cash Equivalents [Abstract] |
Components of Cash, Cash Equivalents, and Investments | Cash, cash equivalents, and investments consisted of the following (in thousands):
|  | December 31, |
|  | 2013 |  |  | 2012 |
Cash |  | $ | 40,124 |  |  | $ | 34,986 |
Cash equivalents |  |  | - |  |  |  | 5,098 |
Money market instruments |  |  | 520 |  |  |  | 5,076 |
Cash and cash equivalents |  |  | 40,644 |  |  |  | 45,160 |
Corporate bonds |  |  | 109,040 |  |  |  | 46,001 |
Asset-backed securities |  |  | 53,559 |  |  |  | 17,666 |
Sovereign bonds |  |  | 11,448 |  |  |  | 3,986 |
Municipal bonds |  |  | 9,276 |  |  |  | 16,224 |
Agency bonds |  |  | 1,499 |  |  |  | 7,482 |
Treasury bills |  |  | - |  |  |  | 5,997 |
Covered bonds |  |  | - |  |  |  | 5,618 |
Corporate stock |  |  | - |  |  |  | 2,131 |
Short-term investments |  |  | 184,822 |  |  |  | 105,105 |
Corporate bonds |  |  | 109,909 |  |  |  | 100,072 |
Treasury bills |  |  | 73,666 |  |  |  | 36,276 |
Asset-backed securities |  |  | 21,820 |  |  |  | 34,710 |
Sovereign bonds |  |  | 16,385 |  |  |  | 10,606 |
Municipal bonds |  |  | 5,919 |  |  |  | 17,846 |
Agency bonds |  |  | - |  |  |  | 29,441 |
Covered bonds |  |  | - |  |  |  | 5,564 |
Limited partnership interest (accounted for using cost method) |  |  | 1,956 |  |  |  | 3,740 |
Long-term investments |  |  | 229,655 |  |  |  | 238,255 |
|  | $ | 455,121 |  |  | $ | 388,520 |
Summary of Available-for-Sale Investments | The following tables summarize the Company’s available-for-sale investments as of December 31, 2013 (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 108,824 |  |  | $ | 281 |  |  | $ | (65 | ) |  | $ | 109,040 |
Asset-backed securities |  |  | 54,061 |  |  |  | 13 |  |  |  | (515 | ) |  |  | 53,559 |
Sovereign bonds |  |  | 11,445 |  |  |  | 16 |  |  |  | (13 | ) |  |  | 11,448 |
Municipal bonds |  |  | 9,258 |  |  |  | 18 |  |  |  | - |  |  |  | 9,276 |
Agency bonds |  |  | 1,500 |  |  |  | - |  |  |  | (1 | ) |  |  | 1,499 |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  |  | 109,457 |  |  |  | 550 |  |  |  | (98 | ) |  |  | 109,909 |
Treasury bills |  |  | 73,801 |  |  |  | 4 |  |  |  | (139 | ) |  |  | 73,666 |
Asset-backed securities |  |  | 21,866 |  |  |  | 11 |  |  |  | (57 | ) |  |  | 21,820 |
Sovereign bonds |  |  | 16,376 |  |  |  | 35 |  |  |  | (26 | ) |  |  | 16,385 |
Municipal bonds |  |  | 5,901 |  |  |  | 22 |  |  |  | (4 | ) |  |  | 5,919 |
|  | $ | 412,489 |  |  | $ | 950 |  |  | $ | (918) |  |  | $ | 412,521 |
Gross Unrealized Losses and Fair Values for Available-for-Sale Investments | The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of December 31, 2013 (in thousands):
|  | Unrealized Loss Position For Less than 12 Months |  |  | Unrealized Loss Position For Greater than 12 Months |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Treasury bills |  | $ | 61,966 |  |  | $ | (139 | ) |  | $ | - |  |  | $ | - |  |  | $ | 61,966 |  |  | $ | (139 | )
Corporate bonds |  |  | 58,258 |  |  |  | (153 | ) |  |  | 3,122 |  |  |  | (10 | ) |  |  | 61,380 |  |  |  | (163 | )
Asset-backed securities |  |  | 35,138 |  |  |  | (111 | ) |  |  | 18,452 |  |  |  | (461 | ) |  |  | 53,590 |  |  |  | (572 | )
Sovereign bonds |  |  | 15,434 |  |  |  | (39 | ) |  |  | - |  |  |  | - |  |  |  | 15,434 |  |  |  | (39 | )
Municipal bonds |  |  | 2,581 |  |  |  | (4 | ) |  |  | - |  |  |  | - |  |  |  | 2,581 |  |  |  | (4 | )
Agency bonds |  |  | 1,499 |  |  |  | (1 | ) |  |  | - |  |  |  | - |  |  |  | 1,499 |  |  |  | (1 | )
|  | $ | 174,876 |  |  | $ | (447 | ) |  | $ | 21,574 |  |  | $ | (471 | ) |  | $ | 196,450 |  |  | $ | (918 | )
Effective Maturity Dates of Available-for-Sale Investments | The following table presents the effective maturity dates of the Company’s available-for-sale investments as of December 31, 2013 (in thousands):
|  | <1 Year |  |  | 1-2 Years |  |  | 2-3 Years |  |  | 3-4 Years |  |  | Total |
Corporate bonds |  | $ | 109,040 |  |  | $ | 64,080 |  |  | $ | 42,686 |  |  | $ | 3,143 |  |  | $ | 218,949 |
Asset-backed securities |  |  | 53,559 |  |  |  | 14,917 |  |  |  | 6,903 |  |  |  | - |  |  |  | 75,379 |
Treasury bills |  |  | - |  |  |  | 16,003 |  |  |  | 57,663 |  |  |  | - |  |  |  | 73,666 |
Sovereign bonds |  |  | 11,448 |  |  |  | 8,810 |  |  |  | 7,575 |  |  |  | - |  |  |  | 27,833 |
Municipal bonds |  |  | 9,276 |  |  |  | 1,269 |  |  |  | 2,754 |  |  |  | 1,896 |  |  |  | 15,195 |
Agency bonds |  |  | 1,499 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1,499 |
|  | $ | 184,822 |  |  | $ | 105,079 |  |  | $ | 117,581 |  |  | $ | 5,039 |  |  | $ | 412,521 |

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