Interest Rate Swap Derivatives (Schedule Of Notional Amounts Of Outstanding Derivative Positions) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Derivative [Line Items]
Swap fee income	$ (713)	$ (595)	$ (1,845)	$ (1,895)
Collateral already posted, fair value	19,500		19,500		$ 8,600
Not Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Asset derivative, notional/contract amount	194,485		194,485		169,720
Liability derivatives, notional/contract amount	194,485		194,485		169,720
Not Designated as Hedging Instrument | Interest Rate Swap | Other Assets
Derivative [Line Items]
Asset derivative, fair value	18,097		18,097		8,646
Not Designated as Hedging Instrument | Interest Rate Swap | Other Liabilities
Derivative [Line Items]
Liability derivatives, fair value	$ 18,097		$ 18,097		$ 8,646