Loans, Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
With no related allowance recorded [Abstract]
Recorded investment	$ 13,692	$ 15,594
Unpaid principal balance	14,465	16,138
Average recorded investment	14,786	16,038
Interest income recognized	273	669
With an allowance recorded [Abstract]
Recorded investment	2,405	2,563
Unpaid principal balance	2,494	3,579
Related allowance	461	399
Average recorded investment	2,685	3,102
Interest income recognized	30	81
Total [Abstract]
Recorded Investment, total	16,097	18,157
Unpaid principal balance, total	16,959	19,717
Related allowance, total	461	399
Average recorded investment, total	17,471	19,140
Interest income recognized, total	303	750
Commercial and Industrial [Member]
With no related allowance recorded [Abstract]
Recorded investment	243	2,881
Unpaid principal balance	572	3,211
Average recorded investment	2,054	3,015
Interest income recognized	43	139
With an allowance recorded [Abstract]
Recorded investment	170	177
Unpaid principal balance	170	177
Related allowance	0	0
Average recorded investment	172	330
Interest income recognized	3	14
Total [Abstract]
Recorded Investment, total	413	3,058
Unpaid principal balance, total	742	3,388
Related allowance, total	0	0
Average recorded investment, total	2,226	3,345
Interest income recognized, total	46	153
Commercial Secured By Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded investment	12,920	12,373
Unpaid principal balance	13,364	12,587
Average recorded investment	12,326	12,686
Interest income recognized	229	529
With an allowance recorded [Abstract]
Recorded investment	1,502	2,120
Unpaid principal balance	1,591	3,136
Related allowance	142	257
Average recorded investment	1,795	2,514
Interest income recognized	26	67
Total [Abstract]
Recorded Investment, total	14,422	14,493
Unpaid principal balance, total	14,955	15,723
Related allowance, total	142	257
Average recorded investment, total	14,121	15,200
Interest income recognized, total	255	596
Residential Real Estate [Member]
With no related allowance recorded [Abstract]
Recorded investment	521	332
Unpaid principal balance	521	332
Average recorded investment	398	332
Interest income recognized	1	0
With an allowance recorded [Abstract]
Recorded investment	733	264
Unpaid principal balance	733	264
Related allowance	319	142
Average recorded investment	717	257
Interest income recognized	1	0
Total [Abstract]
Recorded Investment, total	1,254	596
Unpaid principal balance, total	1,254	596
Related allowance, total	319	142
Average recorded investment, total	1,115	589
Interest income recognized, total	2	0
Consumer [Member]
With no related allowance recorded [Abstract]
Recorded investment	8	8
Unpaid principal balance	8	8
Average recorded investment	8	5
Interest income recognized	0	1
With an allowance recorded [Abstract]
Recorded investment	0	2
Unpaid principal balance	0	2
Related allowance	0	0
Average recorded investment	1	1
Interest income recognized	0	0
Total [Abstract]
Recorded Investment, total	8	10
Unpaid principal balance, total	8	10
Related allowance, total	0	0
Average recorded investment, total	9	6
Interest income recognized, total	$ 0	$ 1