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Earnings per Share (Tables) | 6 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share | The following is a reconciliation of the numerator and denominator of the diluted earnings per share computations for the periods presented below.
| Three Months Ended March 31, |  | Six Months Ended March 31,
(in millions, except share amounts) | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator: |  |  |  |  |  |  |
Net income | $ | 55.3 |  |  | $ | 39.3 |  |  | $ | 74.8 |  |  | $ | 55.6 |
Less: Allocation to participating securities | (1.7) |  |  | (0.9) |  |  | (2.2) |  |  | (1.2) |
Net income allocated to common stockholders | $ | 53.6 |  |  | $ | 38.4 |  |  | $ | 72.6 |  |  | $ | 54.4 |
Denominator: |  |  |  |  |  |  |
Weighted average number of: |  |  |  |  |  |  |
Common shares outstanding | 19,112,216 |  |  | 18,872,937 |  |  | 19,025,604 |  |  | 18,811,268 |
Dilutive potential common shares outstanding: |  |  |  |  |  |  |
Share-based awards | 558,323 |  |  | 317,016 |  |  | 544,424 |  |  | 321,229 |
Diluted weighted-average common shares | 19,670,539 |  |  | 19,189,953 |  |  | 19,570,028 |  |  | 19,132,497 |

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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/2009/role/commonPracticeRef -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 + Details
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