Stockholders' Equity and Stock Compensation Plans - RSU and PSU Activity (Details) - $ / shares	12 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Sep. 29, 2019
RSUs
Number of Shares
Nonvested balance at the beginning of the period (in shares)	444,000	470,000	488,000
Granted (in shares)	117,934	167,525	179,478
Vested (in shares)	(167,000)	(178,000)	(180,000)
Forfeited (in shares)	(14,000)	(16,000)	(17,000)
Nonvested balance at the end of the period (in shares)	380,631	444,000	470,000
Weighted-Average Grant Date Fair Value
Nonvested balance at the beginning of the period (in dollars per share)	$ 63.93	$ 50.42	$ 39.56
Granted (in dollars per share)	122.02	83.92	66.26
Vested (in dollars per share)	59.64	46.87	36.95
Forfeited (in dollars per share)	77.74	65.43	48.56
Nonvested balance at the end of the period (in dollars per share)	$ 83.30	$ 63.93	$ 50.42
PSUs
Number of Shares
Nonvested balance at the beginning of the period (in shares)	355,000	384,000	323,000
Granted (in shares)	57,542	74,011	89,816
Vested (in shares)	(193,000)	(162,000)	(108,000)
Adjustment (in shares)	99,214	63,643	79,465
Forfeited (in shares)	(1,000)	(5,000)	0
Nonvested balance at the end of the period (in shares)	318,000	355,000	384,000
Weighted-Average Grant Date Fair Value
Nonvested balance at the beginning of the period (in dollars per share)	$ 64.83	$ 53.67	$ 44.27
Granted (in dollars per share)	153.03	99.85	80.41
Vested (in dollars per share)	57.40	47.28	31.63
Adjustment (in dollars per share)	57.40	48.36	31.63
Forfeited (in dollars per share)	74.05	83.98	0
Nonvested balance at the end of the period (in dollars per share)	$ 82.96	$ 64.83	$ 53.67