Derivative Instruments And Hedging Activities (Schedule Of Notional Values And Fair Values Of Derivative Instruments) (Details) (Cash Flow Interest Rate Contracts [Member], Designated As Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Notional Value	$ 239,493	$ 272,967
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives, Positive fair value
Accounts Payable and Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives, Negative fair value	$ (5,932)	$ (5,641)