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Business, Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)
Share data in Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Dec. 25, 2011
Dec. 26, 2010
Dec. 25, 2011
Dec. 26, 2010
Dec. 25, 2011
Contingent Consideration [Member]
Sep. 25, 2011
Contingent Consideration [Member]
Jun. 26, 2011
Contingent Consideration [Member]
Dec. 25, 2011
Derivatives [Member]
Dec. 26, 2010
Derivatives [Member]
Dec. 25, 2011
Derivatives [Member]
Dec. 26, 2010
Derivatives [Member]
Dec. 25, 2011
Investments [Member]
Dec. 26, 2010
Investments [Member]
Dec. 25, 2011
Investments [Member]
Dec. 26, 2010
Investments [Member]
Dec. 26, 2010
Privately Held Domestic Company [Member]
Dec. 25, 2011
Measured at Fair Value on a Recurring Basis [Member]
Jun. 26, 2011
Measured at Fair Value on a Recurring Basis [Member]
Dec. 25, 2011
Measured at Fair Value on a Recurring Basis [Member]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Jun. 26, 2011
Measured at Fair Value on a Recurring Basis [Member]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Dec. 25, 2011
Measured at Fair Value on a Recurring Basis [Member]
Significant Other Observable Inputs (Level 2) [Member]
Jun. 26, 2011
Measured at Fair Value on a Recurring Basis [Member]
Significant Other Observable Inputs (Level 2) [Member]
Dec. 25, 2011
Measured at Fair Value on a Recurring Basis [Member]
Significant Unobservable Inputs (Level 3) [Member]
Jun. 26, 2011
Measured at Fair Value on a Recurring Basis [Member]
Significant Unobservable Inputs (Level 3) [Member]
Reclassification [Abstract]                                                
Reclassification, description
The Company has reclassified accrued employee benefits and severance liability from other accrued expenses to accrued salaries, wages and benefits.  The reclassification has been made to the prior period consolidated balance sheet to conform to the current year presentation.

                                              
Reclassification, amount $ 3,900,000                                              
Fiscal year and Quarter [Abstract]                                                
Minimum number of weeks in a fiscal year 52 52                                            
Maximum number of weeks in a fiscal year 53 53                                            
Number of weeks in a fiscal quarter 13 13                                            
Assets and Liabilities [Abstract]                                                
Cash and cash equivalents                                 43,988,000 15,996,000     43,988,000 15,996,000    
Short-term investments                                 115,344,000 185,541,000 31,864,000 70,292,000 83,480,000 115,249,000    
Long-term investments                                 10,312,000 13,325,000 10,046,000 9,530,000   3,014,000 266,000 781,000
Other assets                                 24,309,000 33,004,000 20,360,000 30,231,000 921,000   3,028,000 2,773,000
Other accrued expenses                                   (309,000)       (309,000)    
Other long-term liabilities                                 (8,390,000) (8,038,000) (7,990,000) (7,638,000)     (400,000) (400,000)
Total                                 185,563,000 239,519,000 54,280,000 102,415,000 128,389,000 133,950,000 2,894,000 3,154,000
Fair value as a percentage of total (in hundredths)                                 100.00% 100.00% 29.30% 42.80% 69.20% 55.90% 1.50% 1.30%
Level 3 as a percentage of total assets (in hundredths)                                             0.20% 0.20%
Business Acquisition [Line Items]                                                
Preferred stock acquired (in shares)                               25.00                
Reconciliation of Assets measured using Level 3 inputs [Roll Forward]                                                
Beginning balance 3,148,000 26,547,000 3,554,000 25,458,000       2,846,000 1,967,000 2,773,000 2,121,000 302,000 24,580,000 781,000 23,337,000                  
Total gains or (losses) (realized or unrealized):                                                
Included in earnings 160,000 3,362,000 287,000 3,745,000       182,000 (122,000) 255,000 (276,000) (22,000) 3,484,000 32,000 4,021,000                  
Included in other comprehensive income   (1,629,000) (190,000) (1,040,000)                 (1,629,000) (190,000) (1,040,000)                  
Purchases, maturities, and sales:                                                
Purchases/additions       1,500,000                     1,500,000                  
Maturities/prepayments (14,000) (1,192,000) (47,000) (2,575,000)               (14,000) (1,192,000) (47,000) (2,575,000)                  
Sales   (9,507,000) (310,000) (9,507,000)                 (9,507,000) (310,000) (9,507,000)                  
Transfers out of level 3   (1,504,000)   (1,504,000)                 (1,504,000)   (1,504,000)                  
Ending balance 3,294,000 16,077,000 3,294,000 16,077,000       3,028,000 1,845,000 3,028,000 1,845,000 266,000 14,232,000 266,000 14,232,000                  
Reconciliation of Liabilities measured using Level 3 inputs [Roll Forward]                                                
Beginning balance         400,000 400,000 400,000                                  
Ending balance         $ 400,000 $ 400,000 $ 400,000