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Investments (Schedule of Investment Securities, Aggregated by Investment Type and Length of Time) (Details) $ in Thousands | 12 Months Ended
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Jun. 28, 2015 USD ($) | Jun. 29, 2014 USD ($) | Jun. 30, 2013 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair Value, Less than 12 Months | $ 99,840 | $ 23,602 |
Unrealized Loss, Less than 12 Months | (484) | (39) |
Fair Value, Greater than 12 Months | 1,812 | 14,569 |
Unrealized Loss, Greater than 12 Months | (15) | (87) |
Fair Value, Total | 101,652 | 38,171 |
Unrealized Loss, Total | $ (499) | $ (126) |
Number of securities with an unrealized loss, Less than 12 Months | 54 | 13 |
Number of securities with an unrealized loss, Greater than 12 Months | 1 | 7 |
Number of securities with an unrealized loss, Total | 55 | 20 |
Available-for-sale Securities, Gross Realized Gain (Loss) | $ 925 | $ 68 | $ 111
Municipal bonds |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair Value, Less than 12 Months | 53,204 | 7,906 |
Unrealized Loss, Less than 12 Months | (341) | (8) |
Fair Value, Greater than 12 Months | 0 | 1,520 |
Unrealized Loss, Greater than 12 Months | 0 | (4) |
Fair Value, Total | 53,204 | 9,426 |
Unrealized Loss, Total | (341) | (12) |
Corporate bonds |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair Value, Less than 12 Months | 46,636 | 15,696 |
Unrealized Loss, Less than 12 Months | (143) | (31) |
Fair Value, Greater than 12 Months | 1,812 | 13,049 |
Unrealized Loss, Greater than 12 Months | (15) | (83) |
Fair Value, Total | 48,448 | 28,745 |
Unrealized Loss, Total | $ (158) | $ (114) |

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 + Details
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