Allowance for Loan and Lease Losses and Credit Disclosures, Troubled Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Troubled Debt Restructurings [Abstract]
Number of Loans	22	41
Pre-Modification Outstanding Recorded Investment	$ 20,503	$ 19,197
Post-Modification Outstanding Recorded Investment	20,434	19,192
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	1	3
Recorded Investment	142	765
Commercial [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	0	1
Pre-Modification Outstanding Recorded Investment	0	109
Post-Modification Outstanding Recorded Investment	0	108
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Real Estate-Construction, 1-4 Family [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	3	2
Pre-Modification Outstanding Recorded Investment	8,319	1,177
Post-Modification Outstanding Recorded Investment	8,319	1,181
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Real Estate-Construction, Other [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	1	0
Pre-Modification Outstanding Recorded Investment	4,012	0
Post-Modification Outstanding Recorded Investment	4,012	0
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Real Estate-Mortgage 1-4 Family [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	10	24
Pre-Modification Outstanding Recorded Investment	2,641	2,438
Post-Modification Outstanding Recorded Investment	2,641	2,405
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	1	0
Recorded Investment	142	0
Real Estate-Mortgage, 5+ Family [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	3	0
Pre-Modification Outstanding Recorded Investment	1,049	0
Post-Modification Outstanding Recorded Investment	1,047	0
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Real Estate-Mortgage Commercial, Owner Occupied [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	3	9
Pre-Modification Outstanding Recorded Investment	3,234	6,894
Post-Modification Outstanding Recorded Investment	3,177	6,852
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	3
Recorded Investment	0	765
Real Estate-Mortgage Commercial, Non-Owner Occupied [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	2	4
Pre-Modification Outstanding Recorded Investment	1,248	3,146
Post-Modification Outstanding Recorded Investment	1,238	3,146
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Real Estate-Mortgage Commercial, Hotel Industry [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	0	1
Pre-Modification Outstanding Recorded Investment	0	5,433
Post-Modification Outstanding Recorded Investment	0	5,500
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Home Equity [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Leases [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	0	0
Installment [Member]
Troubled Debt Restructurings [Abstract]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted [Abstract]
Number of Loans	0	0
Recorded Investment	$ 0	$ 0