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Investments, Available-for-sale Securities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 23, 2012
Jun. 24, 2012
Equity Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs $ 11,630 $ 11,631
Gross Unrealized Gain 2,259 3,848
Gross Unrealized Loss (263)  
Net Unrealized Gain 1,996 3,848
Total securities at fair value 13,626 15,479
Short Term Investment [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs 10,067 63,841
Gross Unrealized Gain 37 36
Gross Unrealized Loss   (5)
Net Unrealized Gain 37 31
Total securities at fair value 10,104 63,872
Short Term Investment [Member] | Corporate Debt [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs   6,045
Gross Unrealized Gain 31 26
Net Unrealized Gain 31 26
Total securities at fair value 31 6,071
Short Term Investment [Member] | U.S. Government and Agency Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs 10,067 57,796
Gross Unrealized Gain 6 10
Gross Unrealized Loss   (5)
Net Unrealized Gain 6 5
Total securities at fair value 10,073 57,801
Long Term Investment [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs 4,991 15,053
Gross Unrealized Gain 12 7
Gross Unrealized Loss   (6)
Net Unrealized Gain 12 1
Total securities at fair value 5,003 15,054
Long Term Investment [Member] | U.S. Government and Agency Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Costs 4,991 15,053
Gross Unrealized Gain 12 7
Gross Unrealized Loss   (6)
Net Unrealized Gain 12 1
Total securities at fair value $ 5,003 $ 15,054