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Shareholders' Equity (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Class of Stock      
Number of common shares issued reflects conversion of Class B to Class A 28,183 11,087 14,471
Class A Common Stock      
Class of Stock      
Common stock voting rights one-tenth    
Minimum percentage of the board of directors to be elected by class of shares 25.00%    
Class B Common Stock      
Class of Stock      
Common stock voting rights one    
Preferred Stock      
Class of Stock      
Preferred stock, shares authorized 10,000,000    
2014 Long Term Incentive Plan      
Class of Stock      
Number of shares authorized for awards available for grant 1,780,950    
Share Repurchase Program      
Class of Stock      
Stock repurchased during period, shares   4,795,568 4,001,877
Stock repurchased during period, value   $ 337,739 $ 273,008
Stock repurchase program, remaining number of shares authorized to be repurchased 3,352,009    
Share Repurchase Program | Class A Common Stock      
Class of Stock      
Stock repurchased during period, shares 850,546    
Stock repurchased during period, value $ 39,103