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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 9 Months Ended
Jun. 29, 2024
Jun. 24, 2023
Jun. 29, 2024
Jun. 24, 2023
Class A Common Stock [Member]        
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]        
Net income allocated, basic $ 24,809,358 $ 37,416,992 $ 83,650,769 $ 122,532,744
Conversion of Class B to Class A shares 6,912,241 10,842,551 23,363,057 35,638,085
Net income allocated, diluted $ 31,721,599 $ 48,259,543 $ 107,013,826 $ 158,170,829
Weighted average shares outstanding, basic 14,538,845 14,404,387 14,530,996 14,390,853
Conversion of Class B to Class A shares 4,455,531 4,589,989 4,463,380 4,603,523
Weighted average shares outstanding, diluted 18,994,376 18,994,376 18,994,376 18,994,376
Earnings per share, Basic $ 1.71 $ 2.60 $ 5.76 $ 8.51
Earnings per share, Diluted $ 1.67 $ 2.54 $ 5.63 $ 8.33
Class B Common Stock [Member]        
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share [Line Items]        
Net income allocated, basic $ 6,912,241 $ 10,842,551 $ 23,363,057 $ 35,638,085
Net income allocated, diluted $ 6,912,241 $ 10,842,551 $ 23,363,057 $ 35,638,085
Weighted average shares outstanding, basic 4,455,531 4,589,989 4,463,380 4,603,523
Weighted average shares outstanding, diluted 4,455,531 4,589,989 4,463,380 4,603,523
Earnings per share, Basic $ 1.55 $ 2.36 $ 5.23 $ 7.74
Earnings per share, Diluted $ 1.55 $ 2.36 $ 5.23 $ 7.74