Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 40	$ 39	$ 1,733	$ 14
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	57	70	172	211
Interest Expense [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	(17)	(31)	(51)	(95)
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	57	70	172	211
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	57	70	172	211
Derivatives in Foreign Currency Relationships [Member] | Other (Income) Expense [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative			$ 1,612	$ (102)