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Earnings per Share - EPS Reconciliation (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Earnings Per Share [Abstract] |  |  |
Income from Continuing Operations | $ 6.4 | $ 54.7 | $ 55.7
Undistributed Earnings Allocated to Participating Securities - Continuing Operations | (0.1) | (1.0) | (1.3)
Income from continuing operations allocated to common shareholders | $ 6.3 | $ 53.7 | $ 54.4
Weighted Average Number of Shares Outstanding, Basic | 18,395,987 | 18,410,561 | 18,525,374
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] |  |  |
Share-based Awards For Diluted Earnings Per Share Calculation | 291,367 | 214,811 | 406,861
Diluted weighted-average shares | 18,687,354 | 18,625,372 | 18,932,235

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- Definition Undistributed Earnings Allocated to Participating Securities - Continuing Operations represents earnings from continuing operations allocated (not distributed) to participating securities under the two-class method to the extent that participating securities may share in earnings as if all of the earnings for the period had been distributed. + References No definition available. + Details
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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4613673-111683 + Details
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