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Stockholders' Equity and Stock Compensation Plans - Stock Options (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Jan. 01, 2017
Sep. 29, 2019
Sep. 30, 2018
Oct. 01, 2017
Number of Options (in thousands)        
Outstanding at the beginning of the year (in shares)   1,355    
Exercised (in shares)   (456)    
Forfeited (in shares)   (5)    
Outstanding at the end of the period (in shares)   894 1,355  
Vested or expected to vest at the end of the period (in shares)   894    
Exercisable at the end of the period (in shares)   671    
Weighted- Average Exercise Price per Share        
Outstanding at the beginning of the year (in dollars per share)   $ 30.87    
Exercised (in dollars per share)   26.21    
Forfeited (in dollars per share)   23.48    
Outstanding at the end of the period (in dollars per share)   33.28 $ 30.87  
Vested or expected to vest at the end of the period (in dollars per share)   33.28    
Exercisable at the end of the period (in dollars per share)   $ 30.75    
Weighted- Average Remaining Contractual Term (in years)        
Outstanding at the end of the period   5 years 29 days    
Vested or expected to vest at the end of the period   5 years 29 days    
Exercisable at the end of the period   4 years 3 months 29 days    
Aggregate Intrinsic Value (in thousands)        
Outstanding at the end of the period   $ 46,176    
Vested or expected to vest at the end of the period   46,176    
Exercisable at the end of the period   $ 36,346    
Assumptions used in the Black-Scholes option-pricing model        
Options granted in the period (in shares)   0    
Stock options exercised   $ 11,751 $ 13,520 $ 18,555
Stock options        
Assumptions used in the Black-Scholes option-pricing model        
Dividend yield 1.00%   1.00%  
Expected stock price volatility, minimum (as a percent)     36.10% 36.10%
Expected stock price volatility, maximum (as a percent)     38.80% 38.80%
Risk-free rate of return, annual, minimum (as a percent)     1.70% 1.70%
Risk-free rate of return, annual, maximum (as a percent)     2.90% 1.90%
Unrecognized compensation cost   $ 2,000    
Weighted-average period to recognize the unrecognized compensation cost   1 year    
Weighted-average fair value of stock options granted (in dollars per share)     $ 14.82 $ 12.35
Aggregate intrinsic value of options exercised   $ 20,400 $ 14,400 $ 16,400
Stock options exercised   11,800 13,500 18,600
Income tax benefit realized from exercises of nonqualified stock options and disqualifying dispositions of qualified options   $ 6,400 $ 5,100 $ 4,900