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Cash, Cash Equivalents, and Investments (Tables) | 9 Months Ended
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Sep. 29, 2013
Cash And Cash Equivalents [Abstract] |
Components of Cash, Cash Equivalents, and Investments | Cash, cash equivalents, and investments consisted of the following (in thousands):
|  | September 29, 2013 |  |  | December 31, 2012 |
Cash |  | $ | 30,221 |  |  | $ | 34,986 |
Cash equivalents |  |  | — |  |  |  | 5,098 |
Money market instruments |  |  | 225 |  |  |  | 5,076 |
Cash and cash equivalents |  |  | 30,446 |  |  |  | 45,160 |
Corporate bonds |  |  | 104,720 |  |  |  | 46,001 |
Asset-backed securities |  |  | 41,269 |  |  |  | 17,666 |
Municipal bonds |  |  | 17,013 |  |  |  | 16,224 |
Treasury bills |  |  | 11,654 |  |  |  | 5,997 |
Sovereign bonds |  |  | 8,553 |  |  |  | 3,986 |
Corporate stock |  |  | 1,864 |  |  |  | 2,131 |
Agency bonds |  |  | 1,499 |  |  |  | 7,482 |
Covered bonds |  |  | — |  |  |  | 5,618 |
Short-term investments |  |  | 186,572 |  |  |  | 105,105 |
Corporate bonds |  |  | 105,621 |  |  |  | 100,072 |
Treasury bills |  |  | 57,623 |  |  |  | 36,276 |
Asset-backed securities |  |  | 28,659 |  |  |  | 34,710 |
Sovereign bonds |  |  | 21,370 |  |  |  | 10,606 |
Municipal bonds |  |  | 10,992 |  |  |  | 17,846 |
Agency bonds |  |  | — |  |  |  | 29,441 |
Covered bonds |  |  | — |  |  |  | 5,564 |
Limited partnership interest (accounted for using cost method) |  |  | 2,455 |  |  |  | 3,740 |
Long-term investments |  |  | 226,720 |  |  |  | 238,255 |
|  | $ | 443,738 |  |  | $ | 388,520 |
Summary of Available-for-Sale Investments | The following tables summarize the Company’s available-for-sale investments as of September 29, 2013 (in thousands):
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Short-term: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 104,580 |  |  | $ | 270 |  |  | $ | (130 | ) |  | $ | 104,720 |
Asset-backed securities |  |  | 41,600 |  |  |  | 7 |  |  |  | (338 | ) |  |  | 41,269 |
Municipal bonds |  |  | 16,969 |  |  |  | 44 |  |  |  | — |  |  |  | 17,013 |
Treasury bills |  |  | 11,647 |  |  |  | 7 |  |  |  | — |  |  |  | 11,654 |
Sovereign bonds |  |  | 8,554 |  |  |  | 9 |  |  |  | (10 | ) |  |  | 8,553 |
Agency bonds |  |  | 1,500 |  |  |  | — |  |  |  | (1 | ) |  |  | 1,499 |
Long-term: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  |  | 105,251 |  |  |  | 513 |  |  |  | (143 | ) |  |  | 105,621 |
Treasury bills |  |  | 57,604 |  |  |  | 24 |  |  |  | (5 | ) |  |  | 57,623 |
Asset-backed securities |  |  | 28,810 |  |  |  | 10 |  |  |  | (161 | ) |  |  | 28,659 |
Sovereign bonds |  |  | 21,386 |  |  |  | 57 |  |  |  | (73 | ) |  |  | 21,370 |
Municipal bonds |  |  | 10,957 |  |  |  | 45 |  |  |  | (10 | ) |  |  | 10,992 |
|  | $ | 408,858 |  |  | $ | 986 |  |  | $ | (871 | ) |  | $ | 408,973 |
Gross Unrealized Losses and Fair Values for Available-for-Sale Investments |
|  | Unrealized Loss Position For: |  |  |  |
|  | Less than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Corporate bonds |  | $ | 62,910 |  |  | $ | (272 | ) |  | $ | 2,455 |  |  | $ | (1 | ) |  | $ | 65,365 |  |  | $ | (273 | )
Asset- backed securities |  |  | 41,848 |  |  |  | (102 | ) |  |  | 16,332 |  |  |  | (397 | ) |  |  | 58,180 |  |  |  | (499 | )
Sovereign bonds |  |  | 9,300 |  |  |  | (25 | ) |  |  | 888 |  |  |  | (58 | ) |  |  | 10,188 |  |  |  | (83 | )
Treasury bills |  |  | 7,614 |  |  |  | (5 | ) |  |  | — |  |  |  | — |  |  |  | 7,614 |  |  |  | (5 | )
Municipal bonds |  |  | 4,374 |  |  |  | (10 | ) |  |  | — |  |  |  | — |  |  |  | 4,374 |  |  |  | (10 | )
Agency bonds |  |  | 1,499 |  |  |  | (1 | ) |  |  | — |  |  |  | — |  |  |  | 1,499 |  |  |  | (1 | )
|  | $ | 127,545 |  |  | $ | (415 | ) |  | $ | 19,675 |  |  | $ | (456 | ) |  | $ | 147,220 |  |  | $ | (871 | )
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 September 29, 2013 (in thousands):
|  | <1 Year |  |  | 1-2 Years |  |  | 2-3 Years |  |  | 3-4 Years |  |  | 4-5 Years |  |  | Total |
Corporate bonds |  | $ | 104,720 |  |  | $ | 61,596 |  |  | $ | 41,299 |  |  | $ | 2,203 |  |  | $ | 523 |  |  | $ | 210,341 |
Asset-backed securities |  |  | 41,269 |  |  |  | 28,659 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 69,928 |
Treasury bills |  |  | 11,654 |  |  |  | 48,015 |  |  |  | 9,608 |  |  |  | — |  |  |  | — |  |  |  | 69,277 |
Sovereign bonds |  |  | 8,553 |  |  |  | 9,571 |  |  |  | 10,911 |  |  |  | — |  |  |  | 888 |  |  |  | 29,923 |
Municipal bonds |  |  | 17,013 |  |  |  | 4,576 |  |  |  | 4,531 |  |  |  | 1,385 |  |  |  | 500 |  |  |  | 28,005 |
Agency bonds |  |  | 1,499 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,499 |
|  | $ | 184,708 |  |  | $ | 152,417 |  |  | $ | 66,349 |  |  | $ | 3,588 |  |  | $ | 1,911 |  |  | $ | 408,973 |

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