Earnings per Share - EPS Reconciliation (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ 15.0	$ 37.1	$ 11.8
Undistributed Earnings Allocated to Participating Securities - Continuing Ops	(0.6)	(0.9)	(0.2)
Income from continuing operations allocated to common stockholders	14.4	36.2	11.6
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0.2	0.6
Undistributed Earnings Allocated to Participating Securities - Disc Ops	0	0	0
Income from discontinued operations allocated to common stockholders	0	0.2	0.6
Extraordinary loss	0	0	(7.0)
Less: Allocation to participating securities	0	0	0.1
Extraordinary loss allocated to common stockholders	0	0	(6.9)
Net Income (Loss) Available to Common Stockholders, Diluted	15.0	37.3	5.4
Undistributed Earnings Allocated to Participating Securities	(0.6)	(0.9)	(0.1)
Diluted net income allocated to common stockholders	$ 14.4	$ 36.4	$ 5.3
Weighted Average Number of Shares Outstanding, Basic	18,282,939	17,618,085	17,306,019
Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]
Stock Options And Warrants For Diluted Earnings Per Share Calculation	873,960	949,369	577,214
Diluted weighted-average shares	19,156,899	18,567,454	17,883,233