Loans (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Performing and non-accrual loans
0-29 Days Past Due	$ 636,155	$ 586,743
30-59 Days Past Due	2,767	2,907
60-89 Days Past Due	1,039	4,979
>/= 90 Days Past Due	2,053	3,146
Total	642,014	597,775
Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	630,574	585,031
30-59 Days Past Due	2,531	2,651
60-89 Days Past Due	580	384
>/= 90 Days Past Due	123	57
Total	633,808	588,123
Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	5,581	1,712
30-59 Days Past Due	236	256
60-89 Days Past Due	459	4,595
>/= 90 Days Past Due	1,930	3,089
Total	8,206	9,652
Real Estate | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	366,530	334,300
30-59 Days Past Due	737	645
60-89 Days Past Due	156	31
>/= 90 Days Past Due	0	30
Total	367,423	335,006
Real Estate | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	5,461	1,649
30-59 Days Past Due	220	226
60-89 Days Past Due	415	4,582
>/= 90 Days Past Due	1,790	2,858
Total	7,886	9,315
Commercial and Industrial | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	110,432	108,932
30-59 Days Past Due	596	517
60-89 Days Past Due	140	20
>/= 90 Days Past Due	122	27
Total	111,290	109,496
Commercial and Industrial | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	31	61
30-59 Days Past Due	10	30
60-89 Days Past Due	41	11
>/= 90 Days Past Due	65	95
Total	147	197
Consumer | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	111,531	107,821
30-59 Days Past Due	1,198	1,489
60-89 Days Past Due	284	333
>/= 90 Days Past Due	1	0
Total	113,014	109,643
Consumer | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	89	2
30-59 Days Past Due	6	0
60-89 Days Past Due	3	2
>/= 90 Days Past Due	75	136
Total	173	140
Residential Real Estate | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	106,526	86,301
30-59 Days Past Due	467	422
60-89 Days Past Due	99	31
>/= 90 Days Past Due	0	30
Total	107,092	86,784
Residential Real Estate | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	1,008	953
30-59 Days Past Due	220	105
60-89 Days Past Due	42	230
>/= 90 Days Past Due	1,443	2,156
Total	2,713	3,444
Commercial Real Estate | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	235,125	216,100
30-59 Days Past Due	198	194
60-89 Days Past Due	57	0
>/= 90 Days Past Due	0	0
Total	235,380	216,294
Commercial Real Estate | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	4,403	250
30-59 Days Past Due	0	121
60-89 Days Past Due	0	4,352
>/= 90 Days Past Due	347	574
Total	4,750	5,297
Construction, Land Acquisition and Development | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	24,879	31,899
30-59 Days Past Due	72	29
60-89 Days Past Due	0	0
>/= 90 Days Past Due	0	0
Total	24,951	31,928
Construction, Land Acquisition and Development | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	50	446
30-59 Days Past Due	0	0
60-89 Days Past Due	373	0
>/= 90 Days Past Due	0	128
Total	423	574
State and Political Subdivisions | Performing (Accruing) Loans
Performing and non-accrual loans
0-29 Days Past Due	42,081	33,978
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
>/= 90 Days Past Due	0	0
Total	42,081	33,978
State and Political Subdivisions | Non-accrual Loans
Performing and non-accrual loans
0-29 Days Past Due	0	0
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
>/= 90 Days Past Due		0
Total	$ 0	$ 0