Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Class A Common Stock [Member] Common Stock [Member]	Class B Common Stock [Member] Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Sep. 28, 2024	$ 727,247	$ 222,472	$ 6,737,631	$ 1,538,061,740	$ 1,545,749,090
Balance (in shares) at Sep. 28, 2024	14,544,925	4,449,451
Net income				16,588,340	16,588,340
Other comprehensive income (loss), net of income tax			2,337,737		2,337,737
Cash dividends				(3,067,331)	(3,067,331)
Common stock conversions		$ (41)
Common stock conversions (in shares)		(825)
Common stock conversions	$ 41
Common stock conversions (in shares)	825
Balance at Dec. 28, 2024	$ 727,288	$ 222,431	9,075,368	1,551,582,749	1,561,607,836
Balance (in shares) at Dec. 28, 2024	14,545,750	4,448,626
Balance at Sep. 28, 2024	$ 727,247	$ 222,472	6,737,631	1,538,061,740	1,545,749,090
Balance (in shares) at Sep. 28, 2024	14,544,925	4,449,451
Net income					31,694,355
Other comprehensive income (loss), net of income tax					504,087
Balance at Mar. 29, 2025	$ 727,353	$ 222,366	7,241,718	1,563,621,421	1,571,812,858
Balance (in shares) at Mar. 29, 2025	14,547,055	4,447,321
Balance at Dec. 28, 2024	$ 727,288	$ 222,431	9,075,368	1,551,582,749	1,561,607,836
Balance (in shares) at Dec. 28, 2024	14,545,750	4,448,626
Net income				15,106,015	15,106,015
Other comprehensive income (loss), net of income tax			(1,833,650)		(1,833,650)
Cash dividends				(3,067,343)	(3,067,343)
Common stock conversions		$ (65)
Common stock conversions (in shares)		(1,305)
Common stock conversions	$ 65
Common stock conversions (in shares)	1,305
Balance at Mar. 29, 2025	$ 727,353	$ 222,366	7,241,718	1,563,621,421	1,571,812,858
Balance (in shares) at Mar. 29, 2025	14,547,055	4,447,321
Balance at Sep. 27, 2025	$ 727,431	$ 222,288	5,597,024	1,609,384,834	1,615,931,577
Balance (in shares) at Sep. 27, 2025	14,548,611	4,445,765
Net income				28,128,370	28,128,370
Other comprehensive income (loss), net of income tax			(529,552)		(529,552)
Cash dividends				(3,067,386)	(3,067,386)
Balance at Dec. 27, 2025	$ 727,431	$ 222,288	5,067,472	1,634,445,818	1,640,463,009
Balance (in shares) at Dec. 27, 2025	14,548,611	4,445,765
Balance at Sep. 27, 2025	$ 727,431	$ 222,288	5,597,024	1,609,384,834	1,615,931,577
Balance (in shares) at Sep. 27, 2025	14,548,611	4,445,765
Net income					52,395,785
Other comprehensive income (loss), net of income tax					(190,466)
Balance at Mar. 28, 2026	$ 727,435	$ 222,284	5,406,558	1,655,645,846	1,662,002,123
Balance (in shares) at Mar. 28, 2026	14,548,686	4,445,690
Balance at Dec. 27, 2025	$ 727,431	$ 222,288	5,067,472	1,634,445,818	1,640,463,009
Balance (in shares) at Dec. 27, 2025	14,548,611	4,445,765
Net income				24,267,415	24,267,415
Other comprehensive income (loss), net of income tax			339,086		339,086
Cash dividends				(3,067,387)	(3,067,387)
Common stock conversions		$ (4)
Common stock conversions (in shares)		(75)
Common stock conversions	$ 4
Common stock conversions (in shares)	75
Balance at Mar. 28, 2026	$ 727,435	$ 222,284	$ 5,406,558	$ 1,655,645,846	$ 1,662,002,123
Balance (in shares) at Mar. 28, 2026	14,548,686	4,445,690