Loans and the Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 Loan
Changes in restructured loans
Totals at January 1, 2012, Number of Loans	31
Totals at January 1, 2012, Recorded Investment	$ 36,311
Additional loans with concessions, Number of Loans	7
Additional loans with concessions, Recorded Investment	4,731
Reductions due to:
Totals at September 30, 2012, Number of Loans	32
Reclassified as nonperforming, Number of Loans	(3)
Totals at September 30, 2012, Recorded Investment	30,918
Reclassified as nonperforming, Recorded Investment	(5,622)
Charge-offs, Recorded Investment	(1,632)
Transfer to other real estate owned, Number of Loans	(1)
Transfer to other real estate owned, Recorded Investment	(419)
Principal paydowns, Recorded Investment	(1,600)
Lapse of concession period, Number of Loans	(2)
Lapse of concession period, Recorded Investment	$ (851)