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Stockholders' Equity and Stock Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 28, 2021
Mar. 29, 2020
Mar. 28, 2021
Mar. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 5.7 $ 5.0 $ 10.6 $ 9.4
Performance-based restricted stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of shares that ultimately vest depending on growth in diluted earnings per share     50.00%  
Percentage of shares that ultimately vest depending on the shareholder return relative to peer group of companies over vesting period     50.00%  
Performance-based restricted stock | Non-employee directors and executive officers        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares)     57,542  
Granted, fair value (in dollars per share)     $ 153.03  
Vesting period     3 years  
Restricted stock units | Non-employee directors, executive officers and employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares)     108,464  
Granted, fair value (in dollars per share)     $ 121.17  
Restricted stock units | Executive officers and employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     4 years  
Restricted stock units | Non-employee director        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period     1 year