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Fair Value Disclosures (Other Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 27, 2017
Jun. 28, 2017
2.60% notes [Member]    
Fair Value Disclosure, Senior Notes [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.60%  
Long-term Debt $ 249,639 $ 249,495
Long-term Debt, Fair Value $ 250,933 250,480
3.88% notes [Member]    
Fair Value Disclosure, Senior Notes [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.88%  
Long-term Debt $ 298,001 297,912
Long-term Debt, Fair Value $ 293,307 286,077
5.00% notes [Member]    
Fair Value Disclosure, Senior Notes [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 5.00%  
Long-term Debt $ 344,597 344,405
Long-term Debt, Fair Value $ 346,941 $ 347,956