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Stockholders' Equity and Stock Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Jun. 26, 2016
Jun. 28, 2015
Jun. 26, 2016
Jun. 28, 2015
Stockholder's equity and stock compensation plans        
Stock-based compensation expense $ 3.2 $ 2.7 $ 9.3 $ 8.1
Options granted (in shares)     241,932  
Exercise price of stock options granted (in dollars per share)     $ 27.16  
Non-employee directors and executive officers        
Stockholder's equity and stock compensation plans        
Weighted-average fair value of stock options granted (in dollars per share)     $ 8.05  
Stock Options | Executive officers        
Stockholder's equity and stock compensation plans        
Vesting period     4 years  
Stock Options | Non-employee director        
Stockholder's equity and stock compensation plans        
Vesting period     1 year  
RSUs | Non-employee director        
Stockholder's equity and stock compensation plans        
Vesting period     1 year  
RSUs | Executive officers and employees        
Stockholder's equity and stock compensation plans        
Vesting period     4 years  
Performance-based restricted stock        
Stockholder's equity and stock compensation plans        
Percentage of shares that ultimately vest depending on fiscal year earnings per share growth rates     50.00%  
Percentage of shares that ultimately vest depending on fiscal year shareholder vesting period     50.00%  
Performance-based restricted stock | Non-employee directors and executive officers        
Stockholder's equity and stock compensation plans        
Granted (in shares)     137,777  
Granted, fair value (in dollars per share)     $ 31.63  
Vesting period     3 years  
Time-based restricted stock | Non-employee directors, executive officers and employees        
Stockholder's equity and stock compensation plans        
Granted (in shares)     215,539  
Granted, fair value (in dollars per share)     $ 27.16