Loans and Allowance for Loan Losses (Details 3) (USD $)	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	$ 134,000	$ 919,000
Total past due loans 60 - 89 Days Past Due	434,000	190,000
Total past due loans Greater Than 89 Days Past Due	3,978,000	5,008,000
Total Past Due	4,546,000	6,117,000
Current	1,054,116,000	1,035,072,000
Total Loans	1,058,662,000	1,041,189,000	1,060,996,000
Recorded Balance greater than 89 Days and Accruing	0	0
Commercial and industrial [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	80,000
Total past due loans 60 - 89 Days Past Due	67,000	0
Total past due loans Greater Than 89 Days Past Due	578,000	871,000
Total Past Due	645,000	951,000
Current	278,655,000	284,371,000
Total Loans	279,300,000	285,322,000
Recorded Balance greater than 89 Days and Accruing	0	0
Vacant land, land development, and residential construction [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	289,000
Total past due loans 60 - 89 Days Past Due	0	0
Total past due loans Greater Than 89 Days Past Due	357,000	614,000
Total Past Due	357,000	903,000
Current	41,813,000	47,196,000
Total Loans	42,170,000	48,099,000
Recorded Balance greater than 89 Days and Accruing	0	0
Real estate - owner occupied [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	199,000
Total past due loans 60 - 89 Days Past Due	61,000	0
Total past due loans Greater Than 89 Days Past Due	58,000	1,337,000
Total Past Due	119,000	1,536,000
Current	253,053,000	257,741,000
Total Loans	253,172,000	259,277,000
Recorded Balance greater than 89 Days and Accruing	0	0
Real estate - non-owner occupied [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	303,000
Total past due loans 60 - 89 Days Past Due	0	0
Total past due loans Greater Than 89 Days Past Due	2,288,000	1,123,000
Total Past Due	2,288,000	1,426,000
Current	355,164,000	323,460,000
Total Loans	357,452,000	324,886,000
Recorded Balance greater than 89 Days and Accruing	0	0
Real estate - multi-family and residential rental [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	0
Total past due loans 60 - 89 Days Past Due	0	0
Total past due loans Greater Than 89 Days Past Due	264,000	613,000
Total Past Due	264,000	613,000
Current	53,258,000	50,309,000
Total Loans	53,522,000	50,922,000
Recorded Balance greater than 89 Days and Accruing	0	0
Total commercial [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	0	871,000
Total past due loans 60 - 89 Days Past Due	128,000	0
Total past due loans Greater Than 89 Days Past Due	3,545,000	4,558,000
Total Past Due	3,673,000	5,429,000
Current	981,943,000	963,077,000
Total Loans	985,616,000	968,506,000	987,491,000
Recorded Balance greater than 89 Days and Accruing	0	0
Retail Home equity and other [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	48,000	1,000
Total past due loans 60 - 89 Days Past Due	0	0
Total past due loans Greater Than 89 Days Past Due	0	13,000
Total Past Due	48,000	14,000
Current	37,289,000	38,903,000
Total Loans	37,337,000	38,917,000
Recorded Balance greater than 89 Days and Accruing	0	0
Retail 1-4 family mortgages [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	86,000	47,000
Total past due loans 60 - 89 Days Past Due	306,000	190,000
Total past due loans Greater Than 89 Days Past Due	433,000	437,000
Total Past Due	825,000	674,000
Current	34,884,000	33,092,000
Total Loans	35,709,000	33,766,000
Recorded Balance greater than 89 Days and Accruing	0	0
Total retail [Member]
Age analysis of past due loans
Total past due loans 30 - 59 Days Past Due	134,000	48,000
Total past due loans 60 - 89 Days Past Due	306,000	190,000
Total past due loans Greater Than 89 Days Past Due	433,000	450,000
Total Past Due	873,000	688,000
Current	72,173,000	71,995,000
Total Loans	73,046,000	72,683,000	73,505,000
Recorded Balance greater than 89 Days and Accruing	$ 0	$ 0