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Marketable Securities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Sep. 26, 2020 | Jun. 27, 2020
Marketable Securities [Line Items] |  |
Amortized Cost Basis | $ 121,858 | $ 107,284
Gross Unrealized Gains | 8,559 | 8,983
Gross Unrealized Losses | (175) | 0
Fair Value | $ 130,242 | 116,267
Minimum |  |
Marketable Securities [Line Items] |  |
Debt securities maturities | 1 year |
Maximum |  |
Marketable Securities [Line Items] |  |
Debt securities maturities | 10 years |
Short-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | $ 17,762 | 18,233
Long-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | 112,480 | 98,034
Corporate bonds |  |
Marketable Securities [Line Items] |  |
Amortized Cost Basis | 88,593 | 78,651
Gross Unrealized Gains | 3,524 | 4,064
Gross Unrealized Losses | (174) | 0
Fair Value | 91,943 | 82,715
Corporate bonds | Short-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | 17,762 | 18,233
Corporate bonds | Long-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | 74,181 | 64,482
Government bonds |  |
Marketable Securities [Line Items] |  |
Amortized Cost Basis | 33,265 | 28,633
Gross Unrealized Gains | 5,035 | 4,919
Gross Unrealized Losses | (1) | 0
Fair Value | 38,299 | 33,552
Government bonds | Short-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | 0 | 0
Government bonds | Long-Term Marketable Securities |  |
Marketable Securities [Line Items] |  |
Fair Value | $ 38,299 | $ 33,552

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