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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

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