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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. 30, 2024
Mar. 25, 2023
Mar. 30, 2024
Mar. 25, 2023
Class A Common Stock [Member]        
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]        
Net income allocated, basic $ 24,944,280 $ 31,398,357 $ 58,839,087 $ 85,111,213
Conversion of Class B to Class A shares 6,954,346 9,141,448 16,453,140 24,800,073
Net income allocated, diluted $ 31,898,626 $ 40,539,805 $ 75,292,227 $ 109,911,286
Weighted average shares outstanding, basic 14,536,449 14,386,862 14,527,072 14,384,087
Conversion of Class B to Class A shares 4,457,927 4,607,514 4,467,304 4,610,289
Weighted average shares outstanding, diluted 18,994,376 18,994,376 18,994,376 18,994,376
Earnings per share, Basic $ 1.72 $ 2.18 $ 4.05 $ 5.92
Earnings per share, Diluted $ 1.68 $ 2.13 $ 3.96 $ 5.79
Class B Common Stock [Member]        
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]        
Net income allocated, basic $ 6,954,346 $ 9,141,448 $ 16,453,140 $ 24,800,073
Net income allocated, diluted $ 6,954,346 $ 9,141,448 $ 16,453,140 $ 24,800,073
Weighted average shares outstanding, basic 4,457,927 4,607,514 4,467,304 4,610,289
Weighted average shares outstanding, diluted 4,457,927 4,607,514 4,467,304 4,610,289
Earnings per share, Basic $ 1.56 $ 1.98 $ 3.68 $ 5.38
Earnings per share, Diluted $ 1.56 $ 1.98 $ 3.68 $ 5.38