Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 42	$ 1,652
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	45	59
Interest Expense [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	(3)	(19)
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	0	0
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	45	59
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	45	59
Other (Income) Expense [Member] | Derivatives in Foreign Currency Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	0	1,612
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ 0	$ 0