Consolidated Statements of Shareholders’ 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 Income [Member]	Noncontrolling Interest [Member]
Balances at beginning of period at Sep. 30, 2011	$ 293.9	$ 0.2	$ (0.1)	$ 205.2	$ 93.3	$ (6.0)	$ 1.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12.7				12.8		(0.1)
Other comprehensive (loss) income	3.8					3.8
Excercise of stock options	2.1			2.1
Share-based Compensation	5.9			5.9
Repurchase of stock	(4.0)		(4.0)
Repurchase of stock - adjustments to APIC				0
Disposition or de-consolidation	(1.2)						(1.2)
Balances at end of period at Sep. 30, 2012	313.2	0.2	(4.1)	213.2	106.1	(2.2)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19.3				19.3		0
Other comprehensive (loss) income	(4.2)					(4.2)
Excercise of stock options	1.5			1.5
Share-based Compensation	9.3			9.3
Repurchase of stock	(3.9)		(3.7)
Repurchase of stock - adjustments to APIC				(0.2)
Stock held in escrow for business combination	0.2			0.2
Balances at end of period at Sep. 30, 2013	335.4	0.2	(7.8)	224.0	125.4	(6.4)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	19.3				19.3
Other comprehensive (loss) income	(5.2)					(5.2)
Excercise of stock options	1.3			1.3
Share-based Compensation	4.3			4.3
Repurchase of stock	(9.7)		(9.7)
Repurchase of stock - adjustments to APIC				0
Balances at end of period at Sep. 30, 2014	$ 345.4	$ 0.2	$ (17.5)	$ 229.6	$ 144.7	$ (11.6)	$ 0