CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Dec. 29, 2023	Sep. 29, 2023	Dec. 30, 2022
Accumulated depreciation	$ 180,947	$ 177,426	$ 176,501
Treasury stock (in shares)	30,003	25,342	31,265
Class A
Common stock, issued (in shares)	9,076,240	9,043,189	9,033,439
Common stock, shares outstanding (in shares)	9,076,240	9,043,189	9,033,439
Class B
Common stock, issued (in shares)	1,207,760	1,207,760	1,207,798
Common stock, shares outstanding (in shares)	1,207,760	1,207,760	1,207,798