Derivatives (Schedule Showing Effect Of Derivative Instruments On The Income Statement) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative [Line Items]
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion	$ (455)		$ (297)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing
Derivative Instruments, Gain (Loss) Recognized in Income, Net	(302)		(266)
Interest Rate Products [Member]
Derivative [Line Items]
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion	(455)		(297)
Interest Rate Products [Member] | Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	(302)		(266)
Interest Income Other Non Interest Income [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Other Non Interest Income [Member]
Derivative [Line Items]
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing