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Earnings per Share (Tables) | 9 Months Ended
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Jun. 30, 2017
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) | 2017 |  | 2016 |  | 2017 |  | 2016
Numerator: |  |  |  |  |  |  |
Net income | $ | 12.7 |  |  | $ | 14.6 |  |  | $ | 30.0 |  |  | $ | 37.9 |
Less: Allocation to participating securities | (0.3 | ) |  | (0.3 | ) |  | (0.6 | ) |  | (0.6 | )
Net income allocated to common stockholders | $ | 12.4 |  |  | $ | 14.3 |  |  | $ | 29.4 |  |  | $ | 37.3 |
Denominator: |  |  |  |  |  |  |
Weighted average number of: |  |  |  |  |  |  |
Common shares outstanding | 18,447,053 |  |  | 18,138,754 |  |  | 18,365,939 |  |  | 18,461,063 |
Dilutive potential common shares outstanding: |  |  |  |  |  |  |
Share-based awards | 255,075 |  |  | 183,697 |  |  | 293,199 |  |  | 194,609 |
Diluted weighted-average shares | 18,702,128 |  |  | 18,322,451 |  |  | 18,659,138 |  |  | 18,655,672 |

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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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