Derivative Instruments and Hedging Activities (Details)	12 Months Ended
	Sep. 30, 2014 USD ($) instrument	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2008 Interest rate swaps Derivatives designated as hedging instruments Cash flow hedges USD ($)	Sep. 30, 2014 USD:EUR Foreign exchange contracts Purchase Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:EUR Foreign exchange contracts Purchase Derivatives not designated as hedging instruments EUR (€)	Sep. 30, 2014 USD:EUR Foreign exchange contracts Sale Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:EUR Foreign exchange contracts Sale Derivatives not designated as hedging instruments EUR (€)	Sep. 30, 2014 USD:CAD Foreign exchange contracts Sale Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:CAD Foreign exchange contracts Sale Derivatives not designated as hedging instruments CAD	Sep. 30, 2014 CAD:USD Foreign exchange contracts Purchase Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 CAD:USD Foreign exchange contracts Purchase Derivatives not designated as hedging instruments CAD	Sep. 30, 2014 USD:MXN Foreign exchange contracts Sale Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:MXN Foreign exchange contracts Sale Derivatives not designated as hedging instruments MXN	Sep. 30, 2014 USD:UKPounds Foreign exchange contracts Purchase Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:UKPounds Foreign exchange contracts Purchase Derivatives not designated as hedging instruments GBP (£)	Sep. 30, 2014 USD:UKPounds Foreign exchange contracts Sale Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 USD:UKPounds Foreign exchange contracts Sale Derivatives not designated as hedging instruments GBP (£)	Sep. 30, 2014 UKPounds:EUR Foreign exchange contracts Derivatives not designated as hedging instruments USD ($)	Sep. 30, 2014 UKPounds:EUR Foreign exchange contracts Derivatives not designated as hedging instruments EUR (€)
Derivative Instruments
Notional amount				$ 300,000,000	$ 13,700,000	€ 10,800,000	$ 21,400,000	€ 17,000,000	$ 1,900,000	2,100,000	$ 11,400,000	12,700,000	$ 2,400,000	32,600,000	$ 10,600,000	£ 6,500,000	$ 2,000,000	£ 1,200,000	$ 4,900,000	€ 3,000,000
Designated Cash Flow Hedges
Number of derivative instruments held	0
Deferred gains on interest swaps, net of income tax			3,947,000
Non-designated Cash Flow Hedges
Derivative, Average Forward Exchange Rate (as a percent)							1.2690	1.2690	1.12100	1.12100	1.1183	1.1183	13.4525	13.4525			1.6234	1.6234
Net gains (losses) included in selling, general and administrative expenses	$ 1,935,000	$ (2,846,000)	$ 2,003,000
Weighted average contractual exchange rate for buy contracts (as a percent)					1.2903	1.2903									1.6277	1.6277			0.7976	0.7976