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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