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Note 18. Financial Instruments and Fair Value Measurements (Details) - Estimated Fair Value of Financial Instruments of Current Year (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013
Assets
Assets at fair value	$ 48,951
Commercial Paper, Not Included with Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets at fair value	19,987
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Assets
Assets at fair value	19,987
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Assets
Assets at fair value	28,964
Corporate Debt Securities [Member]
Assets
Assets at fair value	$ 28,964

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

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