Allowance for Loan Losses (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	$ 6,786	$ 10,136
60-89 Days	2,221	2,926
>90 Days	13,691	23,126
Total past due	22,698	36,188
Current	1,349,973	1,361,147
Total loans	1,372,671	1,397,335
>90 Days and still accruing	190
Nonaccrual loans	54,573	61,769
PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	3,093	1,679
60-89 Days	773	63
>90 Days	43	348
Total past due	3,909	2,090
Current	90,879	95,830
Total loans	94,788	97,920
>90 Days and still accruing
Nonaccrual loans	1,703	1,776
RE Mortgage [Member] | Residential [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	1,305	1,702
60-89 Days	650	278
>90 Days	732	674
Total past due	2,687	2,654
Current	123,188	118,601
Total loans	125,875	121,255
>90 Days and still accruing	190
Nonaccrual loans	4,459	4,781
RE Mortgage [Member] | Residential [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	1,709	1,024
60-89 Days	204
>90 Days	43	43
Total past due	1,956	1,067
Current	3,119	4,346
Total loans	5,075	5,413
>90 Days and still accruing
Nonaccrual loans	111	113
RE Mortgage [Member] | Commercial [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	2,326	2,695
60-89 Days	265	1,578
>90 Days	7,852	13,829
Total past due	10,443	18,102
Current	761,853	757,022
Total loans	772,296	775,124
>90 Days and still accruing
Nonaccrual loans	34,853	37,220
RE Mortgage [Member] | Commercial [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	526	500
60-89 Days	569
>90 Days		148
Total past due	1,095	648
Current	68,887	71,442
Total loans	69,982	72,090
>90 Days and still accruing
Nonaccrual loans	1,212	1,218
Home Equity Lines [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	2,635	3,371
60-89 Days	1,226	819
>90 Days	2,072	3,395
Total past due	5,933	7,585
Current	297,705	304,086
Total loans	303,638	311,671
>90 Days and still accruing
Nonaccrual loans	7,027	8,486
Home Equity Lines [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	857	124
60-89 Days		63
>90 Days		157
Total past due	857	344
Current	15,484	16,444
Total loans	16,341	16,788
>90 Days and still accruing
Nonaccrual loans	339	403
Home equity loans [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	109	67
60-89 Days		33
>90 Days	217	217
Total past due	326	317
Current	12,207	12,694
Total loans	12,533	13,011
>90 Days and still accruing
Nonaccrual loans	515	465
Home equity loans [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
Current	347	342
Total loans	347	342
>90 Days and still accruing
Auto indirect [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	28	77
60-89 Days	36	40
>90 Days	94	79
Total past due	158	196
Current	2,663	3,620
Total loans	2,821	3,816
>90 Days and still accruing
Nonaccrual loans	166	174
Auto indirect [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days
60-89 Days
>90 Days
Total past due
Current
Total loans
>90 Days and still accruing
Nonaccrual loans
Other Consumer [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	50	67
60-89 Days	9	40
>90 Days	2	14
Total past due	61	121
Current	24,765	24,142
Total loans	24,826	24,263
>90 Days and still accruing
Nonaccrual loans	27	49
Other Consumer [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	1	31
Total past due	1	31
Current	2,263	2,387
Total loans	2,264	2,418
>90 Days and still accruing
Nonaccrual loans	41	42
C&I [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days	333	1,848
60-89 Days	35	138
>90 Days	2,616	4,782
Total past due	2,984	6,768
Current	103,291	118,354
Total loans	106,275	125,122
>90 Days and still accruing
Nonaccrual loans	4,131	6,750
C&I [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
Current	779	869
Total loans	779	869
>90 Days and still accruing
Construction [Member] | Residential [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days		309
>90 Days	31	42
Total past due	31	351
Current	14,467	11,526
Total loans	14,498	11,877
>90 Days and still accruing
Nonaccrual loans	3,125	3,312
Construction [Member] | Residential [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days
60-89 Days
>90 Days
Total past due
Current
Total loans
>90 Days and still accruing
Nonaccrual loans
Construction [Member] | Commercial [Member] | Originated loans [Member]
Analysis of past due and nonaccrual loans
>90 Days	75	94
Total past due	75	94
Current	9,834	11,102
Total loans	9,909	11,196
>90 Days and still accruing
Nonaccrual loans	270	532
Construction [Member] | Commercial [Member] | PNCI loans [Member]
Analysis of past due and nonaccrual loans
30-59 Days
60-89 Days
>90 Days
Total past due
Current
Total loans
>90 Days and still accruing
Nonaccrual loans