Derivative Financial Instruments (Details)	12 Months Ended
Derivative Financial Instruments (Details)	Sep. 30, 2014 Cash Flow Hedging [Member] Interest Rate Swap [Member] USD ($)	Sep. 30, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member] USD ($)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member] USD ($)	Sep. 30, 2012 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member] USD ($)	Sep. 30, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap June 2018 [Member] USD ($)	Sep. 30, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap September 2015 [Member] USD ($)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap September 2015 [Member] USD ($)	Sep. 30, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap December 2014 [Member] USD ($)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap December 2014 [Member] USD ($)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Interest Rate Swap December 2013 [Member] USD ($)	Sep. 30, 2014 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Option [Member] GBP (£)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Option [Member] USD ($)	Sep. 30, 2013 Designated as Hedging Instrument [Member] Cash Flow Hedging [Member] Foreign Exchange Option [Member] BRL	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] United States of America, Dollars Long [Member] USD ($)	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] United States of America, Dollars Long [Member] USD ($)	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] United States of America, Dollars Short [Member] USD ($)	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] United States of America, Dollars Short [Member] USD ($)	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Long [Member] USD ($)	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Long [Member] BRL	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Long [Member] USD ($)	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Long [Member] BRL	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Short [Member] USD ($)	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member] Brazil, Brazil Real Short [Member] BRL	Sep. 30, 2014 Not Designated as Hedging Instrument [Member] Options Held [Member] USD ($)	Sep. 30, 2013 Not Designated as Hedging Instrument [Member] Options Held [Member] USD ($)
Derivative financial instruments
Effective portion of derivatives before tax effect	$ 3,000,000	$ (2,400,000)	$ (500,000)	$ (8,400,000)
Effective portion of derivatives expected to be reclassified from accumulated other comprehensive loss to interest expense, net	4,800,000
Notional Amount					300,000,000	250,000,000	250,000,000	200,000,000	200,000,000	150,000,000				69,500,000	171,800,000	71,500,000	174,200,000	400,000	1,100,000	1,800,000	4,000,000	3,600,000	8,200,000
Fixed Rate (as a percent)					1.63%	0.95%	0.95%	0.68%	0.68%	0.55%
Notional principal of derivative exchange contracts											£ 0	$ 900,000	2,100,000											$ 0	$ 0