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, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 43	$ 43	$ 86	$ 85
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	43	86	88
Interest Expense [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Amount of (Income) Expense Recognized in Earnings on Derivative	0	0	0	(3)
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	43	86	88
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	$ 43	$ 86	$ 88