Earnings Per Common Share (Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 28, 2026	Mar. 29, 2025	Mar. 28, 2026	Mar. 29, 2025
Class A Common Stock [Member]
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]
Net income allocated, basic	$ 18,991,649	$ 11,819,907	$ 41,004,780	$ 24,799,038
Conversion of Class B to Class A shares	5,275,766	3,286,108	11,391,005	6,895,317
Net income allocated, diluted	$ 24,267,415	$ 15,106,015	$ 52,395,785	$ 31,694,355
Weighted average shares outstanding, basic	14,548,684	14,546,039	14,548,648	14,545,631
Conversion of Class B to Class A shares	4,445,692	4,448,337	4,445,728	4,448,745
Weighted average shares outstanding, diluted	18,994,376	18,994,376	18,994,376	18,994,376
Earnings per share, Basic	$ 1.31	$ 0.81	$ 2.82	$ 1.70
Earnings per share, Diluted	$ 1.28	$ 0.80	$ 2.76	$ 1.67
Class B Common Stock [Member]
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]
Net income allocated, basic	$ 5,275,766	$ 3,286,108	$ 11,391,005	$ 6,895,317
Net income allocated, diluted	$ 5,275,766	$ 3,286,108	$ 11,391,005	$ 6,895,317
Weighted average shares outstanding, basic	4,445,692	4,448,337	4,445,728	4,448,745
Weighted average shares outstanding, diluted	4,445,692	4,448,337	4,445,728	4,448,745
Earnings per share, Basic	$ 1.19	$ 0.74	$ 2.56	$ 1.55
Earnings per share, Diluted	$ 1.19	$ 0.74	$ 2.56	$ 1.55