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Investments (Tables) | 3 Months Ended
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Apr. 04, 2015
Investments |
Summary of the amortized cost and estimated fair value of short-term investments for both available-for-sale and trading securities |
|  | 2015 |  | 2014 |
|  | Amortized |  | Fair |  | Amortized |  | Fair |
(Thousands of dollars) |  | Cost |  | Value |  | Cost |  | Value |
Money market funds |  | $ | 236,974 |  | $ | 236,974 |  | $ | 142,432 |  | $ | 142,432 |
Corporate bonds |  | 11,652 |  | 11,757 |  | 11,000 |  | 11,015 |
U.S. Government agency securities |  | 9,287 |  | 9,354 |  | 9,684 |  | 9,666 |
Asset backed debt securities |  | 2,521 |  | 2,554 |  | 2,260 |  | 2,291 |
U.S. Treasury securities |  | 1,990 |  | 1,996 |  | 523 |  | 522 |
Collateralized mortgage obligations |  | 819 |  | 816 |  | 1,150 |  | 1,170 |
Total available-for-sale short-term investments |  | 263,243 |  | 263,451 |  | 167,049 |  | 167,096 |
High yield trading debt securities |  | 178,466 |  | 175,390 |  | 187,491 |  | 181,483 |
Equity mutual fund |  | 86,309 |  | 86,268 |  | 83,809 |  | 82,542 |
Domestic equity ETF |  | 59,157 |  | 61,806 |  | 31,307 |  | 32,651 |
Money market funds held in trading accounts |  | 6,362 |  | 6,362 |  | 21,401 |  | 21,401 |
Emerging markets trading debt mutual fund |  | 3,323 |  | 2,550 |  | 3,323 |  | 2,614 |
Other trading investments |  | 1,870 |  | 1,792 |  | 2,850 |  | 2,779 |
Total trading short-term investments |  | 335,487 |  | 334,168 |  | 330,181 |  | 323,470 |
Total short-term investments |  | $ | 598,730 |  | $ | 597,619 |  | $ | 497,230 |  | $ | 490,566 |
Summary of estimated fair value of fixed rate securities designated as available-for-sale, classified by the contractual maturity date of the security |
(Thousands of dollars) |  | 2015 |
Due within one year |  | $ | 984 |
Due after one year through three years |  | 11,077 |
Due after three years |  | 12,093 |
Total fixed rate securities |  | $ | 24,154 |

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- Definition A table of investments, shown as a text block. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 6 -Section 10 -Paragraph (c) -Subparagraph (1) + 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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