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Investments (Summary of Gross Unrealized Losses and Estimated Fair Value of Short-term Investments, Aggregated by Investment Type and Length of Time) (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Mar. 26, 2017 USD ($) | Jun. 26, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |
Document Period End Date | Mar. 26, 2017 |
Fair Value, Less than 12 Months | $ 117,415 | $ 30,514
Unrealized Loss, Less than 12 Months | (695) | (82)
Fair Value, Greater than 12 Months | 0 | 3,535
Unrealized Loss, Greater than 12 Months | 0 | (6)
Fair Value, Total | 117,415 | 34,049
Unrealized Loss, Total | $ (695) | $ (88)
Number of Securities with an Unrealized Loss, Less than 12 Months | 85 | 22
Number of Securities with an Unrealized Loss, Greater than 12 Months | 0 | 3
Number of Securities with an Unrealized Loss, Total | 85 | 25
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Fair Value, Less than 12 Months | $ 51,923 | $ 2,936
Unrealized Loss, Less than 12 Months | (218) | (9)
Fair Value, Greater than 12 Months | 0 | 3,535
Unrealized Loss, Greater than 12 Months | 0 | (6)
Fair Value, Total | 51,923 | 6,471
Unrealized Loss, Total | (218) | (15)
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Fair Value, Less than 12 Months | 65,492 | 27,578
Unrealized Loss, Less than 12 Months | (477) | (73)
Fair Value, Greater than 12 Months | 0 | 0
Unrealized Loss, Greater than 12 Months | 0 | 0
Fair Value, Total | 65,492 | 27,578
Unrealized Loss, Total | $ (477) | $ (73)

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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=73527792&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=73527792&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: 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=73527792&loc=d3e27337-111563 Reference 2: 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=73527792&loc=d3e27290-111563 + Details
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