Stockholders' Equity and Stock Compensation Plans - Stock Options (Details) - Stock options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Sep. 28, 2014
Number of Options
Outstanding at the beginning of the year (in shares)	2,985
Granted (in shares)	242
Exercised (in shares)	(839)
Forfeited (in shares)	(21)
Outstanding at the end of the period (in shares)	2,367	2,985
Vested or expected to vest at the end of the period (in shares)	2,320
Exercisable at the end of the period (in shares)	1,776
Weighted-Average Exercise Price per Share
Outstanding at the beginning of the year (in dollars per share)	$ 23.71
Granted (in dollars per share)	27.16
Exercised (in dollars per share)	30.04
Forfeited (in dollars per share)	23.59
Outstanding at the end of the period (in dollars per share)	24.88	$ 23.71
Vested or expected to vest at the end of the period (in dollars per share)	24.88
Exercisable at the end of the period (in dollars per share)	$ 24.10
Weighted-Average Remaining Contractual Term
Outstanding at the end of the period	4 years 15 days
Vested or expected to vest at the end of the period	3 years 11 months 27 days
Exercisable at the end of the period	3 years 15 days
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 25,068
Vested or expected to vest at the end of the period	24,579
Exercisable at the end of the period	20,197
Other disclosures
Unrecognized compensation cost	$ 3,500
Weighted-average period to recognize the unrecognized compensation cost	4 years
Weighted-average fair value of stock options granted (in dollars per share)	$ 8.05	$ 8.20	$ 9.36
Aggregate intrinsic value of options exercised	$ 7,300	$ 2,300	$ 9,300
Assumptions used in the Black-Scholes option-pricing model
Dividend yield (as a percent)	1.20%	1.00%
Expected stock price volatility, minimum (as a percent)	36.10%	36.20%	36.10%
Expected stock price volatility, maximum (as a percent)	38.80%	38.80%	38.80%
Risk-free rate of return, annual, minimum (as a percent)	1.60%	1.50%	1.30%
Risk-free rate of return, annual, maximum (as a percent)	1.80%	1.70%	1.50%
Net cash proceeds from the exercise of stock options	$ 18,000	$ 10,800	$ 23,800
Income tax benefit realized from exercises of nonqualified stock options and disqualifying dispositions of qualified options	$ 5,300	$ 3,000	$ 4,600