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Earnings per Share (Tables) | 3 Months Ended
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Dec. 31, 2015
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 net income per share computations for the periods presented below.
| Three Months Ended December 31,
(in millions, except share amounts) | 2015 |  | 2014
Numerator: |  |  |
Net income | $ | 8.8 |  |  | $ | 9.4 |
Less: Allocation to participating securities | (0.1 | ) |  | (0.2 | )
Net income allocated to common stockholders | $ | 8.7 |  |  | $ | 9.2 |
Diluted net income | $ | 8.8 |  |  | $ | 9.4 |
Less: Allocation to participating securities | (0.1 | ) |  | (0.2 | )
Diluted net income allocated to common stockholders | $ | 8.7 |  |  | $ | 9.2 |
Denominator: |  |  |
Weighted average number of: |  |  |
Common shares outstanding | 18,648,150 |  |  | 18,515,528 |
Dilutive potential common shares outstanding: |  |  |
Share-based awards | 343,753 |  |  | 246,501 |
Diluted weighted-average shares | 18,991,903 |  |  | 18,762,029 |

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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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