Commitments and Contingencies - Contigent Consideration for Acquisitions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended								12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Oct. 31, 2010	Sep. 30, 2012 Hencorp Acquisition [Member]	Sep. 30, 2011 Hencorp Acquisition [Member]	Sep. 30, 2012 RMI-RMC Acquistion [Member]	Sep. 30, 2011 RMI-RMC Acquistion [Member]	Nov. 30, 2011 Coffee Network Acquisition [Member]	Sep. 30, 2012 Hencorp Acquisition [Member]	Sep. 30, 2011 Hencorp Acquisition [Member]	Oct. 31, 2010 Hencorp Acquisition [Member]	Sep. 30, 2012 Hanley Group Acquisition [Member]	Sep. 30, 2011 Hanley Group Acquisition [Member]	Jul. 31, 2010 Hanley Group Acquisition [Member]	Sep. 30, 2012 RMI-RMC Acquistion [Member]	Sep. 30, 2011 RMI-RMC Acquistion [Member]	Apr. 30, 2010 RMI-RMC Acquistion [Member]
Business Acquisition, Contingent Consideration [Line Items]
Business Acquisition, Contingent Consideration, Potential Cash Payment												$ 0.3
Business Acquisition, Contingent Consideration, Potential Cash Payment, Year One				0.3											10.0			3.1
Business Acquisition, Contingent Consideration, Potential Cash Payment, Year Two												0.4
Business Acquisition, Contingent Consideration, Potential Cash Payment Year Three												2.3
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2.1	5.4	26.3		0.1	0.5	0	(1.5)					2.0	4.2
Business Acquisition, Cost of Acquired Entity, Purchase Price										6.5	6.4		53.5	51.6		15.1	15.2
Business Acquisition, Contingent Consideration, at Fair Value					2.5		2.9		0.1			2.3	9.3		15.6			10.7
Contingent payments equal to a % of the forecasted adjusted earnings before interest and taxes													15.00%
Business Combination, Separately Recognized Transactions, Additional Disclosures, Acquisition Cost Expensed	$ 0.4