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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 | 3 Months Ended |
--- | --- | ---
Sep. 24, 2017 USD ($) | Jun. 25, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ 266 | $ 263
Document Period End Date | Sep. 24, 2017 |
Fair Value, Less than 12 Months | $ 68,058 | 84,220
Unrealized Loss, Less than 12 Months | (199) | (263)
Fair Value, Greater than 12 Months | 9,367 | 0
Unrealized Loss, Greater than 12 Months | (67) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 77,425 | $ 84,220
Number of Securities with an Unrealized Loss, Less than 12 Months | 53 | 67
Number of Securities with an Unrealized Loss, Greater than 12 Months | 11 | 0
Number of Securities with an Unrealized Loss, Total | 64 | 67
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ 62 | $ 68
Fair Value, Less than 12 Months | 22,844 | 26,816
Unrealized Loss, Less than 12 Months | (40) | (68)
Fair Value, Greater than 12 Months | 3,795 | 0
Unrealized Loss, Greater than 12 Months | (22) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 26,639 | 26,816
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 204 | 195
Fair Value, Less than 12 Months | 45,214 | 57,404
Unrealized Loss, Less than 12 Months | (159) | (195)
Fair Value, Greater than 12 Months | 5,572 | 0
Unrealized Loss, Greater than 12 Months | (45) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | $ 50,786 | $ 57,404

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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=82897076&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=82897076&loc=d3e27337-111563 + Details
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