Loans and Leases, Part VI (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loan portfolio segment			11
Number of loans entity experienced losses over past twelve quarters			7
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	$ 11,609	$ 13,879	$ 13,648	$ 16,520
Provisions for credit losses	4	2,446	1,010	12,497
Charge-offs	(543)	(2,442)	(3,675)	(15,865)
Recoveries	90	53	177	784
Net charge-offs	(453)	(2,389)	(3,498)	(15,081)
Ending balance	11,160	13,936	11,160	13,936
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	913	1,386	913	1,386
Loans collectively evaluated for impairment	10,247	12,550	10,247	12,550
Ending amount	11,160	13,936	11,160	13,936
Loans Individually Evaluated for Impairment	21,143		21,143		31,882
Loans Collectively Evaluated for Impairment	354,934		354,934		376,833
Total Loans	376,077		376,077		408,715
Commercial and Business Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	3,239		3,239		6,427
Loans Collectively Evaluated for Impairment	118,660		118,660		157,015
Total Loans	121,899		121,899		163,442
Government Program Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	103		103		212
Loans Collectively Evaluated for Impairment	2,236		2,236		2,772
Total Loans	2,339		2,339		2,984
Commercial and Industrial [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	3,564	7,175	6,787	8,209
Provisions for credit losses	(922)	1,538	(3,443)	7,329
Charge-offs	(124)	(983)	(887)	(7,863)
Recoveries	64	496	125	551
Net charge-offs	(60)	(487)	(762)	(7,312)
Ending balance	2,582	8,226	2,582	8,226
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	152	314	152	314
Loans collectively evaluated for impairment	2,430	7,912	2,430	7,912
Ending amount	2,582	8,226	2,582	8,226
Loans Individually Evaluated for Impairment	3,342		3,342		6,639
Loans Collectively Evaluated for Impairment	120,896		120,896		159,787
Total Loans	124,238		124,238		166,426
Real estate - mortgage [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	1,054	1,495	1,416	1,620
Provisions for credit losses	27	176	(286)	456
Charge-offs	(112)	(19)	(165)	(425)
Recoveries	4	26	8	26
Net charge-offs	(108)	7	(157)	(399)
Ending balance	973	1,677	973	1,677
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	709	832	709	832
Loans collectively evaluated for impairment	264	845	264	845
Ending amount	973	1,677	973	1,677
Commercial Real Estate Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	7,623		7,623		8,303
Loans Collectively Evaluated for Impairment	117,132		117,132		110,554
Total Loans	124,755		124,755		118,857
RE Construction and Development [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	5,800	4,856	4,579	5,763
Provisions for credit losses	(2,196)	(4)	(965)	3,962
Charge-offs	0	(1,254)	(10)	(6,734)
Recoveries	0	(474)	0	133
Net charge-offs	0	(1,728)	(10)	(6,601)
Ending balance	3,604	3,124	3,604	3,124
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	6	80	6	80
Loans collectively evaluated for impairment	3,598	3,044	3,598	3,044
Ending amount	3,604	3,124	3,604	3,124
Loans Individually Evaluated for Impairment	5,660		5,660		11,432
Loans Collectively Evaluated for Impairment	60,641		60,641		38,968
Total Loans	66,301		66,301		50,400
Agricultural Loans [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	277	279	508	850
Provisions for credit losses	143	19	2,081	(81)
Charge-offs	(148)	(1)	(2,317)	(538)
Recoveries	0	0	0	66
Net charge-offs	(148)	(1)	(2,317)	(472)
Ending balance	272	297	272	297
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	149	0	149
Loans collectively evaluated for impairment	272	148	272	148
Ending amount	272	297	272	297
Loans Individually Evaluated for Impairment	193		193		1,853
Loans Collectively Evaluated for Impairment	22,685		22,685		33,958
Total Loans	22,878		22,878		35,811
Commercial Lease Financing [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	3	6	1	3
Provisions for credit losses	(1)	(1)	1	103
Charge-offs	0	(6)	0	(106)
Recoveries	0	0	0	0
Net charge-offs	0	(6)	0	(106)
Ending balance	2	0	2	0
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	2	0	2	0
Ending amount	2	0	2	0
Loans Individually Evaluated for Impairment	0		0		0
Loans Collectively Evaluated for Impairment	21		21		49
Total Loans	21		21		49
Residential Mortgages [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	3,816		3,816		3,531
Loans Collectively Evaluated for Impairment	20,385		20,385		20,500
Total Loans	24,201		24,201		24,031
Home Improvement and Home Equity Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	11		11		37
Loans Collectively Evaluated for Impairment	1,757		1,757		1,822
Total Loans	1,768		1,768		1,859
Total Real Estate Mortgage [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	11,450		11,450		11,871
Loans Collectively Evaluated for Impairment	139,274		139,274		132,876
Total Loans	150,724		150,724		144,747
Installment and Other [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	346	68	116	49
Provisions for credit losses	175	189	520	225
Charge-offs	(159)	(179)	(296)	(199)
Recoveries	22	5	44	8
Net charge-offs	(137)	(174)	(252)	(191)
Ending balance	384	83	384	83
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	46	11	46	11
Loans collectively evaluated for impairment	338	72	338	72
Ending amount	384	83	384	83
Installment Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	498		498		87
Loans Collectively Evaluated for Impairment	11,417		11,417		11,195
Total Loans	11,915		11,915		11,282
Unallocated [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	565	0	241	26
Provisions for credit losses	2,778	529	3,102	503
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0	0
Ending balance	3,343	529	3,343	529
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0	0	0
Loans collectively evaluated for impairment	3,343	529	3,343	529
Ending amount	$ 3,343	$ 529	$ 3,343	$ 529
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loan portfolio segment			3