Loans and the Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013 Loan	Dec. 31, 2012 Loan
Changes in restructured loans [Roll Forward]
Totals, Number of Loans, Beginning (loans)	41	36
Additional loans with concessions, Number of Loans (loans)	13
Reclassified as nonperforming, Number of Loans (loans)	(2)
Charge Offs, Number of Loans (loans)	(2)
Transfer to other real estate owned, Number of Loans (loans)	0
Lapse of concession period, Number of Loans (loans)	(4)
Totals, Number of Loans, Ending (loans)	41	36
Changes in recorded investments [Roll Forward]
Totals, Recorded Investment, Beginning	$ 29,436
Additional loans with concessions, Recorded Investment	4,319
Reclassified as Nonperforming Restructured Loans	(3,227)
Charge-offs, Recorded Investment	(877)
Transfer to other real estate owned, Recorded Investment	0
Principal paydowns, Recorded Investment	(1,674)
Lapse of concession period, Recorded Investment	(5,741)
Totals, Recorded Investment, Ending	$ 22,236	$ 29,436