Stock-Based Compensation (Stock-Based Compensation Expense by Type of Award) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
Share-based Payment Arrangement [Abstract]
Employee stock options	$ 1,760	$ 2,415	$ 1,849
Employee stock purchase plan	438	321	283
Restricted stock units and performance restricted stock units	5,018	6,694	5,112
Amounts capitalized as inventory	(2,619)	(2,875)	(1,799)
Amounts recognized in income for amounts previously capitalized as inventory	2,553	2,842	1,838
Total stock-based compensation included in income from operations	7,150	9,397	7,283
Income tax benefit on stock-based compensation	(1,397)	(1,978)	(1,763)
Net stock-based compensation expense included in net income	$ 5,753	$ 7,419	$ 5,520