Fair Value Measurements (Foreclosed Assets Remeasured and Reported at Fair Value) (Details) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Foreclosed Assets Remeasured At Initial Recognition [Member]
Carrying value of foreclosed assets prior to remeasurement	$ 16,595	$ 13,160
Charge-offs recognized in the allowance for loan losses	(3,042)	(2,367)
Fair value	13,553	10,793
Foreclosed Assets Remeasured Subsequent to Initial Recognition [Member]
Carrying value of foreclosed assets prior to remeasurement	3,058	3,043
Write-downs included in other non-interest expense	(803)	(1,054)
Fair value	$ 2,255	$ 1,989