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Investments (Tables) | 3 Months Ended
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Apr. 04, 2015
Investments [Abstract] |
Investments in marketable debt securities | Investments in marketable debt securities were comprised of the following (in thousands):
| April 4, 2015
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
U.S. Treasury securities | $ | 32,506 |  |  | $ | 25 |  |  | $ | — |  |  | $ | 32,531 |
Corporate bonds | 32,791 |  |  | 19 |  |  | (9 | ) |  | 32,801 |
U.S. Agency bonds | 22,528 |  |  | 27 |  |  | — |  |  | 22,555 |
Commercial paper | 14,987 |  |  | — |  |  | — |  |  | 14,987 |
Municipal bonds | 13,035 |  |  | 3 |  |  | (3 | ) |  | 13,035 |
| $ | 115,847 |  |  | $ | 74 |  |  | $ | (12 | ) |  | $ | 115,909 |
| January 3, 2015
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
U.S. Treasury securities | $ | 32,507 |  |  | $ | 12 |  |  | $ | (23 | ) |  | $ | 32,496 |
Corporate bonds | 35,409 |  |  | 2 |  |  | (36 | ) |  | 35,375 |
U.S. Agency bonds | 22,545 |  |  | 4 |  |  | (10 | ) |  | 22,539 |
Commercial paper | 12,487 |  |  | — |  |  | (1 | ) |  | 12,486 |
Municipal bonds | 11,157 |  |  | 2 |  |  | (5 | ) |  | 11,154 |
| $ | 114,105 |  |  | $ | 20 |  |  | $ | (75 | ) |  | $ | 114,050 |
Maturities of marketable debt securities | Maturities of marketable debt securities were as follows (in thousands):
| April 4, 2015 |  | January 3, 2015
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Marketable debt securities – current (due in less than one year) | $ | 75,019 |  |  | $ | 75,035 |  |  | $ | 69,607 |  |  | $ | 69,609 |
Marketable debt securities – non-current (due in one to two years) | 40,828 |  |  | 40,874 |  |  | 44,498 |  |  | 44,441 |
| $ | 115,847 |  |  | $ | 115,909 |  |  | $ | 114,105 |  |  | $ | 114,050 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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