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Investments (Summary of Gross Unrealized Losses and Estimated Fair Value of Short-term Investments, Aggregated by Investment Type and Length of Time) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Jun. 29, 2014
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months $ 59,129   $ 23,602
Unrealized Loss, Less than 12 Months (286)   (39)
Fair Value, Greater than 12 Months 14,451   14,569
Unrealized Loss, Greater than 12 Months (157)   (87)
Fair Value, Total 73,580   38,171
Unrealized Loss, Total (443)   (126)
Number of Securities with an Unrealized Loss, Less than 12 Months 32   13
Number of Securities with an Unrealized Loss, Greater than 12 Months 7   7
Number of Securities with an Unrealized Loss, Total 39   20
Gain on sale of investments, net 2 10  
Municipal Bonds [Member]
      
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months 10,125   7,906
Unrealized Loss, Less than 12 Months (21)   (8)
Fair Value, Greater than 12 Months 1,516   1,520
Unrealized Loss, Greater than 12 Months (3)   (4)
Fair Value, Total 11,641   9,426
Unrealized Loss, Total (24)   (12)
Corporate Bonds [Member]
      
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months 49,004   15,696
Unrealized Loss, Less than 12 Months (265)   (31)
Fair Value, Greater than 12 Months 12,935   13,049
Unrealized Loss, Greater than 12 Months (154)   (83)
Fair Value, Total 61,939   28,745
Unrealized Loss, Total (419)   (114)
U.S. Agency Securities [Member]
      
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months 0   0
Unrealized Loss, Less than 12 Months 0   0
Fair Value, Greater than 12 Months 0   0
Unrealized Loss, Greater than 12 Months 0   0
Fair Value, Total 0   0
Unrealized Loss, Total 0   0
Non-U.S. Certificates of Deposit [Member]
      
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months 0   0
Unrealized Loss, Less than 12 Months 0   0
Fair Value, Greater than 12 Months 0   0
Unrealized Loss, Greater than 12 Months 0   0
Fair Value, Total 0   0
Unrealized Loss, Total 0   0
Non-U.S. Government Securities [Member]
      
Schedule of Available-for-sale Securities [Line Items]      
Fair Value, Less than 12 Months 0   0
Unrealized Loss, Less than 12 Months 0   0
Fair Value, Greater than 12 Months 0   0
Unrealized Loss, Greater than 12 Months 0   0
Fair Value, Total 0   0
Unrealized Loss, Total $ 0   $ 0