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Investments (Notes) | 12 Months Ended
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Jan. 03, 2015
Investments [Abstract] |
Investments | Investments Marketable Debt Securities Investments in marketable debt securities were comprised of the following (in thousands):
| 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 |
Municipal bonds | 11,157 |  |  | 2 |  |  | (5 | ) |  | 11,154 |
Commercial paper | 12,487 |  |  | — |  |  | (1 | ) |  | 12,486 |
| $ | 114,105 |  |  | $ | 20 |  |  | $ | (75 | ) |  | $ | 114,050 |
| December 28, 2013
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
U.S. Treasury securities | $ | 23,975 |  |  | $ | 15 |  |  | $ | (1 | ) |  | $ | 23,989 |
Corporate bonds | 35,804 |  |  | 3 |  |  | (23 | ) |  | 35,784 |
U.S. Agency bonds | 19,517 |  |  | 10 |  |  | (4 | ) |  | 19,523 |
Municipal bonds | 7,474 |  |  | 23 |  |  | (2 | ) |  | 7,495 |
| $ | 86,770 |  |  | $ | 51 |  |  | $ | (30 | ) |  | $ | 86,791 |
Maturities of marketable debt securities were as follows (in thousands):
| January 3, 2015 |  | December 28, 2013
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Marketable debt securities – current (due in less than one year) | $ | 69,607 |  |  | $ | 69,609 |  |  | $ | 52,122 |  |  | $ | 52,159 |
Marketable debt securities – non-current (due in one to two years) | 44,498 |  |  | 44,441 |  |  | 34,648 |  |  | 34,632 |
| $ | 114,105 |  |  | $ | 114,050 |  |  | $ | 86,770 |  |  | $ | 86,791 |
During 2014, 2013 and 2012, respectively, $54.2 million, $53.3 million and $26.0 million of marketable debt securities matured and were redeemed at face value. During 2014, there were no other-than-temporary declines in market value. Other Investments We have a minority equity investment in one of our strategic product-development partners. The carrying value of this investment at January 3, 2015 and December 28, 2013, using the cost method, is $6.0 million and $4.5 million, respectively, and is included in other assets on our consolidated balance sheet.

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- Definition The entire disclosure for investment holdings. This includes the information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12) -URI http://asc.fasb.org/extlink&oid=34726532&loc=d3e611133-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Article 12 + Details
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