Loans and Allowance for Loan Losses, Age Analysis of Past Due Loans Receivable (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	$ 4,460	$ 4,193
60 to 89 Days Past Due	709	2,282
Greater than 90 Days	9,679	2,450
Total Past Due	14,848	8,925
Current	436,518	449,889
Total Financing Receivables	451,366	458,814
Carrying Amount > 90 Days and Accruing	132	101	263
Nonaccruals	10,650	4,621	2,109
Commercial and Industrial [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	92	216
60 to 89 Days Past Due	52	164
Greater than 90 Days	41	442
Total Past Due	185	822
Current	26,955	28,239
Total Financing Receivables	27,140	29,061
Carrying Amount > 90 Days and Accruing	0	0
Nonaccruals	643	987
Commercial Real Estate [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	0	1,656
60 to 89 Days Past Due	0	946
Greater than 90 Days	7,712	252
Total Past Due	7,712	2,854
Current	185,293	198,566
Total Financing Receivables	193,005	201,420
Carrying Amount > 90 Days and Accruing	0	0
Nonaccruals	7,712	252
Construction and Land [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	508	371
60 to 89 Days Past Due	250	0
Greater than 90 Days	136	0
Total Past Due	894	371
Current	39,151	37,741
Total Financing Receivables	40,045	38,112
Carrying Amount > 90 Days and Accruing	0	0
Nonaccruals	136	0
Consumer [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	39	139
60 to 89 Days Past Due	10	29
Greater than 90 Days	5	18
Total Past Due	54	186
Current	9,507	5,265
Total Financing Receivables	9,561	5,451
Carrying Amount > 90 Days and Accruing	1	0
Nonaccruals	4	4
Residential Real Estate [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	2,397	1,463
60 to 89 Days Past Due	397	993
Greater than 90 Days	1,474	1,684
Total Past Due	4,268	4,140
Current	132,322	134,906
Total Financing Receivables	136,590	139,046
Carrying Amount > 90 Days and Accruing	0	101
Nonaccruals	1,927	2,928
Home Equity Line of Credit [Member]
Age analysis of past due loans receivable [Abstract]
30 to 59 Days Past Due	1,424	348
60 to 89 Days Past Due	0	150
Greater than 90 Days	311	54
Total Past Due	1,735	552
Current	43,290	45,172
Total Financing Receivables	45,025	45,724
Carrying Amount > 90 Days and Accruing	131	0
Nonaccruals	$ 228	$ 450