Marketable Securities (Details) - USD ($)	3 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Jun. 29, 2019
Marketable Securities [Line Items]
Amortized Cost Basis	$ 117,339,000		$ 116,440,000
Gross Unrealized Gains	4,762,000		3,579,000
Gross Unrealized Losses	(2,000)		0
Fair Value	$ 122,099,000		120,019,000
Realized gain (loss) on marketable securities		$ 0
Minimum
Marketable Securities [Line Items]
Debt securities maturities	1 year
Maximum
Marketable Securities [Line Items]
Debt securities maturities	11 years
Short-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	$ 12,017,000		12,006,000
Long-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	110,082,000		108,013,000
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost Basis	88,505,000		87,540,000
Gross Unrealized Gains	2,067,000		1,734,000
Gross Unrealized Losses	(2,000)		0
Fair Value	90,570,000		89,274,000
Corporate bonds | Short-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	12,017,000		12,006,000
Corporate bonds | Long-Term Marketable Securities
Marketable Securities [Line Items]
Fair Value	78,553,000		77,268,000
Government bonds
Marketable Securities [Line Items]
Amortized Cost Basis	28,834,000		28,900,000
Gross Unrealized Gains	2,695,000		1,845,000
Gross Unrealized Losses	0		0
Fair Value	31,529,000		30,745,000
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	$ 31,529,000		$ 30,745,000