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Earnings Per Common Share (Tables) | 12 Months Ended
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Sep. 30, 2017
Earnings Per Common Share [Abstract] |
Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | Year Ended
﻿ |  | September 30, 2017
﻿ |  | Class A |  | Class B
﻿Numerator: Allocated net income |  |  |  |  |  |
﻿Net income allocated, basic |  | $ | 38,393,384 |  | $ | 15,480,196
﻿Conversion of Class B to Class A shares |  |  | 15,480,196 |  |  | —
﻿Net income allocated, diluted |  | $ | 53,873,580 |  | $ | 15,480,196
﻿ |  |  |  |  |  |
﻿Denominator: Weighted average shares outstanding |  |  |  |  |  |
﻿Weighted average shares outstanding, basic |  |  | 14,039,125 |  |  | 6,220,651
﻿Conversion of Class B to Class A shares |  |  | 6,220,651 |  |  | —
﻿Weighted average shares outstanding, diluted |  |  | 20,259,776 |  |  | 6,220,651
﻿ |  |  |  |  |  |
﻿Earnings per share |  |  |  |  |  |
﻿ Basic |  | $ | 2.74 |  | $ | 2.49
﻿ Diluted |  | $ | 2.66 |  | $ | 2.49
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended |  | Year Ended
﻿ |  | September 24, 2016 |  | September 26, 2015
﻿ |  | Class A |  | Class B |  | Class A |  | Class B
﻿Numerator: Allocated net income |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income allocated, basic |  | $ | 38,380,304 |  | $ | 15,809,162 |  | $ | 41,356,536 |  | $ | 17,996,587
﻿Conversion of Class B to Class A shares |  |  | 15,809,162 |  |  | — |  |  | 17,996,587 |  |  | —
﻿Net income allocated, diluted |  | $ | 54,189,466 |  | $ | 15,809,162 |  | $ | 59,353,123 |  | $ | 17,996,587
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Denominator: Weighted average shares outstanding |  |  |  |  |  |  |  |  |  |  |  |
﻿Weighted average shares outstanding, basic |  |  | 13,943,299 |  |  | 6,316,477 |  |  | 13,711,241 |  |  | 6,548,534
﻿Conversion of Class B to Class A shares |  |  | 6,316,477 |  |  | — |  |  | 6,548,534 |  |  | —
﻿Weighted average shares outstanding, diluted |  |  | 20,259,776 |  |  | 6,316,477 |  |  | 20,259,775 |  |  | 6,548,534
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Earnings per share |  |  |  |  |  |  |  |  |  |  |  |
﻿ Basic |  | $ | 2.75 |  | $ | 2.50 |  | $ | 3.02 |  | $ | 2.74
﻿ Diluted |  | $ | 2.68 |  | $ | 2.50 |  | $ | 2.93 |  | $ | 2.74
﻿

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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