Derivative Activities (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Unrealized Gain Loss On Derivatives	$ 510	$ 1,000
Derivative Assets	771	1,330
Derivative Liabilities	1,281	2,437
Derivative, Notional Amount	152,600	136,100
Interest Rate Cap [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Derivative Assets	153	143
Derivative Liabilities	153	139
Derivative, Notional Amount	152,600	136,100
Designated as Hedging Instrument [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Derivative Liabilities	510	1,004
Not Designated as Hedging Instrument [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Derivative Assets	618	1,187
Derivative Liabilities	618	1,187
Other derivative
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Derivative Liabilities	$ 0	$ 107