Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 43	$ 41	$ 85	$ 1,693
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	43	56	88	115
Interest Expense [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	0	(15)	(3)	(34)
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	0	0	0	0
Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	43	56	88	115
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	0	0	0	0
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	43	56	88	115
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