MARKETABLE SECURITIES (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 27, 2020	Jun. 29, 2019
Marketable Securities [Line Items]
Amortized Cost Basis	$ 107,284	$ 116,440
Gross Unrealized Gains	8,983	3,579
Gross Unrealized Losses	0	0
Fair Value	$ 116,267	120,019
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	$ 18,233	12,006
Long-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	98,034	108,013
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost Basis	78,651	87,540
Gross Unrealized Gains	4,064	1,734
Gross Unrealized Losses	0	0
Fair Value	82,715	89,274
Corporate bonds \| Short-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	18,233	12,006
Corporate bonds \| Long-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	64,482	77,268
Government bonds
Marketable Securities [Line Items]
Amortized Cost Basis	28,633	28,900
Gross Unrealized Gains	4,919	1,845
Gross Unrealized Losses	0	0
Fair Value	33,552	30,745
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	$ 33,552	$ 30,745

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