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Cash, Cash Equivalents, and Investments (Tables) | 3 Months Ended
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Mar. 30, 2014
Cash and Cash Equivalents [Abstract] |
Components of Cash, Cash Equivalents, and Investments | Cash, cash equivalents, and investments consisted of the following (in thousands):
| March 30, 2014 |  | December 31, 2013
Cash | $ | 36,740 |  |  | $ | 40,124 |
Money market instruments | 5,723 |  |  | 520 |
Cash and cash equivalents | 42,463 |  |  | 40,644 |
Corporate bonds | 33,585 |  |  | 109,040 |
Municipal bonds | 4,766 |  |  | 9,276 |
Sovereign bonds | 3,016 |  |  | 11,448 |
Asset-backed securities | 410 |  |  | 53,559 |
Agency bonds | — |  |  | 1,499 |
Short-term investments | 41,777 |  |  | 184,822 |
Corporate bonds | 190,767 |  |  | 109,909 |
Treasury bills | 86,804 |  |  | 73,666 |
Asset-backed securities | 74,475 |  |  | 21,820 |
Sovereign bonds | 17,401 |  |  | 16,385 |
Municipal bonds | 7,013 |  |  | 5,919 |
Agency bonds | 1,500 |  |  | — |
Limited partnership interest | 1,956 |  |  | 1,956 |
Long-term investments | 379,916 |  |  | 229,655 |
| $ | 464,156 |  |  | $ | 455,121 |
Summary of Available-for-Sale Investments | The following table summarizes the Company’s available-for-sale investments as of March 30, 2014 (in thousands):
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Short-term: |  |  |  |  |  |  |
Corporate bonds | $ | 33,480 |  |  | $ | 105 |  |  | $ | — |  |  | $ | 33,585 |
Municipal bonds | 4,758 |  |  | 8 |  |  | — |  |  | 4,766 |
Sovereign bonds | 2,996 |  |  | 20 |  |  | — |  |  | 3,016 |
Asset-backed securities | 410 |  |  | — |  |  | — |  |  | 410 |
Long-term: |  |  |  |  |  |  |
Corporate bonds | 190,185 |  |  | 680 |  |  | (98 | ) |  | 190,767 |
Treasury bills | 86,941 |  |  | 2 |  |  | (139 | ) |  | 86,804 |
Asset-backed securities | 74,471 |  |  | 69 |  |  | (65 | ) |  | 74,475 |
Sovereign bonds | 17,367 |  |  | 52 |  |  | (18 | ) |  | 17,401 |
Municipal bonds | 6,968 |  |  | 45 |  |  | — |  |  | 7,013 |
Agency bonds | 1,500 |  |  | — |  |  | — |  |  | 1,500 |
| $ | 419,076 |  |  | $ | 981 |  |  | $ | (320 | ) |  | $ | 419,737 |
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 March 30, 2014 (in thousands):
| 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 | $ | 55,024 |  |  | $ | (98 | ) |  | $ | — |  |  | $ | — |  |  | $ | 55,024 |  |  | $ | (98 | )
Asset-backed securities | 23,535 |  |  | (38 | ) |  | 8,456 |  |  | (27 | ) |  | 31,991 |  |  | (65 | )
Sovereign bonds | 3,347 |  |  | (18 | ) |  | — |  |  | — |  |  | 3,347 |  |  | (18 | )
Treasury bills | 82,753 |  |  | (139 | ) |  | — |  |  | — |  |  | 82,753 |  |  | (139 | )
| $ | 164,659 |  |  | $ | (293 | ) |  | $ | 8,456 |  |  | $ | (27 | ) |  | $ | 173,115 |  |  | $ | (320 | )
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 March 30, 2014 (in thousands):
| 1 Year or Less |  | 1-2 Years |  | 2-3 Years |  | 3-4 Years |  | 4-5 Years |  | 5-8 Years |  | Total
Corporate bonds | $ | 33,585 |  |  | $ | 64,435 |  |  | $ | 94,424 |  |  | $ | 2,428 |  |  | $ | 29,480 |  |  | $ | — |  |  | $ | 224,352 |
Treasury bills | — |  |  | 32,317 |  |  | 54,487 |  |  | — |  |  | — |  |  | — |  |  | 86,804 |
Asset-backed securities | 410 |  |  | 5,287 |  |  | 14,663 |  |  | 29,396 |  |  | 21,243 |  |  | 3,886 |  |  | 74,885 |
Sovereign bonds | 3,016 |  |  | 12,502 |  |  | 4,899 |  |  | — |  |  | — |  |  | — |  |  | 20,417 |
Municipal bonds | 4,766 |  |  | 3,981 |  |  | 1,475 |  |  | 1,557 |  |  | — |  |  | — |  |  | 11,779 |
Agency bonds | — |  |  | — |  |  | 1,500 |  |  | — |  |  | — |  |  | — |  |  | 1,500 |
| $ | 41,777 |  |  | $ | 118,522 |  |  | $ | 171,448 |  |  | $ | 33,381 |  |  | $ | 50,723 |  |  | $ | 3,886 |  |  | $ | 419,737 |

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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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