Condensed Consolidated Statement of Stockholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balances as of beginning of period at Sep. 30, 2013	$ 335.4	$ 0.2	$ (7.8)	$ 224.0	$ 125.4	$ (6.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13.5				13.5
Other comprehensive loss	(3.9)					(3.9)
Exercise of stock options	1.4			1.4
Share-based Compensation	3.2			3.2
Repurchase of stock	(9.7)		(9.7)
Balances as of end of period at Jun. 30, 2014	$ 339.9	$ 0.2	$ (17.5)	$ 228.6	$ 138.9	$ (10.3)