Derivatives And Hedging Activity (Schedule Of Interest Rate Derivatives) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) contract
Interest Rate Contract July 2014 [Member]
Derivative [Line Items]
Number of Contracts | contract	5
Beginning Date	Jul. 11, 2014
Maturity Date	Jul. 11, 2017
Rate	1.10%
Total Notional Amount | $	$ 30.0
Interest Rate Contract March 2015 [Member]
Derivative [Line Items]
Number of Contracts | contract	1
Beginning Date	May 29, 2015
Maturity Date	May 31, 2018
Rate	1.47%
Total Notional Amount | $	$ 10.0
Interest Rate Contract June 2015 [Member]
Derivative [Line Items]
Number of Contracts | contract	1
Beginning Date	Jun. 30, 2015
Maturity Date	Jun. 30, 2018
Rate	1.40%
Total Notional Amount | $	$ 5.0