Interest Rate Derivatives and Hedging Activities (Schedule Of Interest Rate Derivative) (Details) (Designated as Hedging Instrument, Cash Flow Hedging, Interest rate swaps, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015 derivative	Dec. 31, 2014 derivative
Designated as Hedging Instrument | Cash Flow Hedging | Interest rate swaps
Derivative [Line Items]
Number of Instruments	6	6
Notional Amount	$ 179,988	$ 179,988