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Summarizes Cost And Estimated Fair Value Of Short Term Fixed Income Securities (Detail) - USD ($) $ in Thousands | Dec. 29, 2017 | Dec. 30, 2016
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Fair Value Measurements [Line Items] |  |
Due within one year, Amortized Cost | $ 43,000 |
Due between one and two years, Amortized Cost | 28,997 |
Total Amortized Cost | 71,997 |
Due within one year, Estimated Fair Value | 42,816 |
Due between one and two years, Estimated Fair Value | 28,788 |
Total Estimated Fair Value | $ 71,604 | $ 58,755

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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