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Earnings per Share (Tables) | 12 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] | The following is a reconciliation of the numerator and denominator of the diluted net income per share computations for the periods presented below.
| Year Ended September 30,
(in millions, except share amounts) | 2015 |  | 2014 |  | 2013
Numerator: |  |  |  |  |
Income from continuing operations | $ | 55.7 |  |  | $ | 19.6 |  |  | $ | 18.6 |
Less: Allocation to participating securities | (1.3 | ) |  | (0.5 | ) |  | (0.7 | )
Income from continuing operations allocated to common stockholders | $ | 54.4 |  |  | $ | 19.1 |  |  | $ | 17.9 |
Income (loss) from discontinued operations | $ | — |  |  | $ | (0.3 | ) |  | $ | 0.7 |
Less: Allocation to participating securities | — |  |  | — |  |  | (0.1 | )
Income (loss) from discontinued operations allocated to common stockholders | $ | — |  |  | $ | (0.3 | ) |  | $ | 0.6 |
Diluted net income | $ | 55.7 |  |  | $ | 19.3 |  |  | $ | 19.3 |
Less: Allocation to participating securities | (1.3 | ) |  | (0.5 | ) |  | (0.8 | )
Diluted net income allocated to common stockholders | $ | 54.4 |  |  | $ | 18.8 |  |  | $ | 18.5 |
Denominator: |  |  |  |  |
Weighted average number of: |  |  |  |  |
Common shares outstanding | 18,525,374 |  |  | 18,528,302 |  |  | 18,443,233 |
Dilutive potential common shares outstanding: |  |  |  |  |
Share-based awards | 406,861 |  |  | 604,000 |  |  | 625,264 |
Diluted weighted-average shares | 18,932,235 |  |  | 19,132,302 |  |  | 19,068,497 |

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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/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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