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Earnings Per Share | 12 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Earnings Per Share | Note 19 — Earnings Per Share The following table sets forth the computation of basic and diluted earnings per share:
|  | Year Ended September 30, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 436,826 |  |  | $ | 409,331 |  |  | $ | 446,163 |
Net income and dividends attributable to participating restricted shares |  |  | (3,517 | ) |  |  | (3,592 | ) |  |  | (4,597 | )
Numerator for basic earnings per common share |  | $ | 433,309 |  |  | $ | 405,739 |  |  | $ | 441,566 |
Undistributed income allocated to participating restricted shares |  |  | 2,512 |  |  |  | 2,604 |  |  |  | 3,539 |
Undistributed income reallocated to participating restricted shares |  |  | (2,488 | ) |  |  | (2,569 | ) |  |  | (3,485 | )
Numerator for diluted earnings per common share |  | $ | 433,333 |  |  | $ | 405,774 |  |  | $ | 441,620 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding — basic |  |  | 146,017 |  |  |  | 149,168 |  |  |  | 154,423 |
Weighted average number of participating restricted shares |  |  | (1,176 | ) |  |  | (1,309 | ) |  |  | (1,591 | )
Weighted average number of common shares — basic |  |  | 144,841 |  |  |  | 147,859 |  |  |  | 152,832 |
Effect of assumed conversion of 0.5% convertible notes |  |  | — |  |  |  | 5 |  |  |  | 14 |
Effect of dilutive stock options granted |  |  | 1,414 |  |  |  | 2,002 |  |  |  | 2,372 |
Weighted average number of common shares — diluted |  |  | 146,255 |  |  |  | 149,866 |  |  |  | 155,218 |
Basic earnings per common share |  | $ | 2.99 |  |  | $ | 2.74 |  |  | $ | 2.89 |
Diluted earnings per common share |  | $ | 2.96 |  |  | $ | 2.71 |  |  | $ | 2.85 |
For the fiscal years ended September 30, 2017, 2016 and 2015, 1,281, 1,785 and 724 shares, respectively, on a weighted average basis, were attributable to antidilutive outstanding stock options and therefore were not included in the calculation of diluted earnings per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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