Earnings Per Share - Numerators and Denominators in Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Basic EPS:
Net income available to common shareholders	$ 125,643	$ 152,152	$ 151,746
Net income available to common shareholders (in shares)	52,395	53,220	53,914
Net income available to common shareholders (in usd per share)	$ 2.40	$ 2.86	$ 2.81
Effect of dilutive securities:
Options to purchase common stock (in shares)	295	477	645
Options to purchase common stock (in usd per share)	$ (0.02)	$ (0.02)	$ (0.03)
Restricted shares (in shares)	638	728	689
Restricted shares (in usd per share)	$ (0.03)	$ (0.04)	$ (0.03)
Performance stock units (in shares)	99	0	0
Performance stock units (in usd per share)	$ 0	$ 0	$ 0
Diluted EPS:
Net income available to common shareholders	$ 125,643	$ 152,152	$ 151,746
Net income available to common shareholders (in shares)	53,427	54,425	55,248
Net income available to common shareholders (in usd per share)	$ 2.35	$ 2.80	$ 2.75