XML 85 R69.htm IDEA: XBRL DOCUMENT v3.5.0.2
Stockholders' Equity and Stock Compensation Plans - ESPP (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Oct. 02, 2016
Sep. 27, 2015
Sep. 28, 2014
ESPP      
Stock-based compensation expense $ 12,964 $ 10,926 $ 10,374
ESPP      
Stockholder's equity and stock compensation plans      
Shares purchased 209 243 245
Weighted-average purchase price (in dollars per share) $ 22.54 $ 21.44 $ 22.99
Cash received from exercise of purchase rights $ 4,707 $ 5,204 $ 5,604
Aggregate intrinsic value $ 710 $ 1,277 $ 1,221
Assumptions used in the Black-Scholes option-pricing model      
Dividend yield (as a percent) 1.30% 1.10%  
Expected stock price volatility (as a percent) 23.70% 23.70% 29.20%
Risk-free rate of return, annual (as a percent) 0.20% 0.20% 0.10%
Expected life 1 year 1 year 1 year
ESPP      
Stock-based compensation expense $ 400 $ 600 $ 700
Unrecognized compensation cost 100 $ 100  
Accumulated amount by participants to purchase the entity's common stock $ 2,800