Loans and Leases, Part V (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Rating	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Number of risk rating approaches	2
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	$ 66,847	$ 67,219
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	66,847	67,219
Commercial Risk, Construction, and Other Non-Consumer Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	331,461	332,826
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	331,461	332,826
Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	76,678	72,117
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	76,678	72,117
Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	142,195	133,599
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	142,195	133,599
RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	81,623	90,941
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	81,623	90,941
Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	30,965	36,169
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	30,965	36,169
Residential Mortgages [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	54,223	55,016
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	54,223	55,016
Home Improvement and Home Equity [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	1,270	1,319
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	1,270	1,319
Installment [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	11,354	10,884
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	11,354	10,884
Grades 1 and 2 [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	847	885
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	847	885
Grades 1 and 2 [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	827	825
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	827	825
Grades 1 and 2 [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Grades 1 and 2 [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Grades 1 and 2 [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	20	60
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	20	60
Grade 3 [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	11,588	8,874
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	11,588	8,874
Grade 3 [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	4,850	2,071
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	4,850	2,071
Grade 3 [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	5,892	5,947
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	5,892	5,947
Grade 3 [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	846	856
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	846	856
Grade 3 [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Grade 4 and 5 - Pass [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	287,913	293,868
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	287,913	293,868
Grade 4 and 5 - Pass [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Notes receivable, period of loss recognition	3 years
Grade 4 and 5 - Pass [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Notes receivable, period of loss recognition	4 years
Grade 4 and 5 - Pass [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	67,596	66,098
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	67,596	66,098
Grade 4 and 5 - Pass [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	123,424	116,606
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	123,424	116,606
Grade 4 and 5 - Pass [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	66,084	75,191
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	66,084	75,191
Grade 4 and 5 - Pass [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	30,809	35,973
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	30,809	35,973
Grade 6 - Special Mention [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	2,607	2,008
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	2,607	2,008
Grade 6 - Special Mention [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	2,468	1,867
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	2,468	1,867
Grade 6 - Special Mention [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Grade 6 - Special Mention [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	139	141
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	139	141
Grade 6 - Special Mention [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Grade 7 - Substandard [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	28,506	27,191
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	28,506	27,191
Grade 7 - Substandard [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	937	1,256
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	937	1,256
Grade 7 - Substandard [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	12,879	11,046
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	12,879	11,046
Grade 7 - Substandard [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	14,554	14,753
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	14,554	14,753
Grade 7 - Substandard [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	136	136
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	136	136
Grade 8 - Doubtful [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0
Grade 8 - Doubtful [Member] | Commercial And Industrial [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0
Grade 8 - Doubtful [Member] | Commercial RE [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0
Grade 8 - Doubtful [Member] | RE Construction and Development Loans [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0
Grade 8 - Doubtful [Member] | Agricultural [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0
Not graded [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	41,304	41,257
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	41,304	41,257
Not graded [Member] | Residential Mortgages [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	30,491	30,727
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	30,491	30,727
Not graded [Member] | Home Improvement and Home Equity [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	1,261	1,309
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	1,261	1,309
Not graded [Member] | Installment [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	9,552	9,221
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	9,552	9,221
Pass [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	22,020	21,994
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	22,020	21,994
Pass [Member] | Residential Mortgages [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	20,477	20,572
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	20,477	20,572
Pass [Member] | Home Improvement and Home Equity [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Pass [Member] | Installment [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	1,543	1,422
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	1,543	1,422
Special Mention [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	988	958
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	988	958
Special Mention [Member] | Residential Mortgages [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	904	909
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	904	909
Special Mention [Member] | Home Improvement and Home Equity [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	0	0
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	0	0
Special Mention [Member] | Installment [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	84	49
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	84	49
Substandard [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	2,535	3,010
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	2,535	3,010
Substandard [Member] | Residential Mortgages [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	2,351	2,808
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	2,351	2,808
Substandard [Member] | Home Improvement and Home Equity [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	9	10
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	9	10
Substandard [Member] | Installment [Member]
Credit risk ratings for commercial, construction, and other non-consumer related loans [Abstract]
Total	175	192
Credit risk ratings for consumer related loans and other homogenous loans [Abstract]
Total	$ 175	$ 192