Investments, Available-for-sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 23, 2012	Jun. 24, 2012
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	$ 11,631	$ 11,631
Gross Unrealized Gain	1,433	3,848
Gross Unrealized Loss	(808)
Net Unrealized Gain	625	3,848
Total securities at fair value	12,256	15,479
Short Term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	75,738	63,841
Gross Unrealized Gain	39	36
Gross Unrealized Loss		(5)
Net Unrealized Gain	39	31
Total securities at fair value	75,777	63,872
Short Term Investment [Member] | Corporate Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	6,022	6,045
Gross Unrealized Gain	28	26
Net Unrealized Gain	28	26
Total securities at fair value	6,050	6,071
Short Term Investment [Member] | U.S. Government and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	69,716	57,796
Gross Unrealized Gain	11	10
Gross Unrealized Loss		(5)
Net Unrealized Gain	11	5
Total securities at fair value	69,727	57,801
Long Term Investment [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	10,034	15,053
Gross Unrealized Gain	14	7
Gross Unrealized Loss		(6)
Net Unrealized Gain	14	1
Total securities at fair value	10,048	15,054
Long Term Investment [Member] | U.S. Government and Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Costs	10,034	15,053
Gross Unrealized Gain	14	7
Gross Unrealized Loss		(6)
Net Unrealized Gain	14	1
Total securities at fair value	$ 10,048	$ 15,054