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Investments (Summary of Short-term Investments by Type) (Details) - USD ($) $ in Thousands | Sep. 27, 2015 | Jun. 28, 2015
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 546,110 | $ 572,160
Gross Unrealized Gains | 2,824 | 1,820
Gross Unrealized Losses | (221) | (499)
Estimated Fair Value | 548,713 | 573,481
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 192,470 | 194,123
Gross Unrealized Gains | 1,650 | 988
Gross Unrealized Losses | (91) | (341)
Estimated Fair Value | 194,029 | 194,770
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 158,116 | 152,831
Gross Unrealized Gains | 1,174 | 832
Gross Unrealized Losses | (130) | (158)
Estimated Fair Value | 159,160 | 153,505
Non-U.S. Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 195,524 | 225,206
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | $ 195,524 | $ 225,206

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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 + Details
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