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Earnings per Share (Tables) | 9 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] | Basic EPS has been computed by dividing net income by the weighted-average number of common shares outstanding. 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 June 30, |  | Nine Months Ended June 30,
(in millions, except share amounts) | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |  |
Net income | $ | 36.6 |  |  | $ | 16.3 |  |  | $ | 92.2 |  |  | $ | 57.9 |
Less: Allocation to participating securities | (0.9 | ) |  | (0.3 | ) |  | (2.1 | ) |  | (1.0 | )
Net income allocated to common stockholders | $ | 35.7 |  |  | $ | 16.0 |  |  | $ | 90.1 |  |  | $ | 56.9 |
Denominator: |  |  |  |  |  |  |
Weighted average number of: |  |  |  |  |  |  |
Common shares outstanding | 18,807,104 |  |  | 18,781,401 |  |  | 18,809,823 |  |  | 18,731,203 |
Dilutive potential common shares outstanding: |  |  |  |  |  |  |
Share-based awards | 296,062 |  |  | 230,125 |  |  | 312,858 |  |  | 272,517 |
Diluted weighted-average common shares | 19,103,166 |  |  | 19,011,526 |  |  | 19,122,681 |  |  | 19,003,720 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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