Loans, Part VI (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Loan Segment	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	$ 13,648	$ 16,520
Provisions for credit losses	1,019	13,602
Charge-offs	(4,278)	(17,294)
Recoveries	1,395	820
Net charge-offs	(2,883)	(16,474)
Ending balance	11,784	13,648
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	658	1,254
Loans collectively evaluated for impairment	11,126	12,394
Ending amount	11,784	13,648
Loans Individually Evaluated for Impairment	21,931	31,881
Loans Collectively Evaluated for Impairment	378,126	376,834
Total Loans	400,057	408,715
Commercial and Business Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	1,343	6,427
Loans Collectively Evaluated for Impairment	68,437	89,649
Total Loans	69,780	96,076
Government Program Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	88	212
Loans Collectively Evaluated for Impairment	2,249	2,772
Total Loans	2,337	2,984
Commercial and Industrial [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	4,782	7,602
Provisions for credit losses	(2,730)	5,870
Charge-offs	(1,080)	(9,340)
Recoveries	642	650
Net charge-offs	(438)	(8,690)
Ending balance	1,614	4,782
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	37	112
Loans collectively evaluated for impairment	1,577	4,670
Ending amount	1,614	4,782
Loans Individually Evaluated for Impairment	1,431	6,639
Loans Collectively Evaluated for Impairment	70,686	92,421
Total Loans	72,117	99,060
Real Estate - Mortgage [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	2,070	1,890
Provisions for credit losses	(235)	498
Charge-offs	(620)	(453)
Recoveries	77	135
Net charge-offs	(543)	(318)
Ending balance	1,292	2,070
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	621	690
Loans collectively evaluated for impairment	671	1,380
Ending amount	1,292	2,070
Commercial Real Estate Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	11,055	6,687
Loans Collectively Evaluated for Impairment	122,544	133,903
Total Loans	133,599	140,590
RE Construction and Development Loans [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	5,634	6,081
Provisions for credit losses	(3,431)	6,300
Charge-offs	(10)	(6,771)
Recoveries	621	24
Net charge-offs	611	(6,747)
Ending balance	2,814	5,634
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	71
Loans collectively evaluated for impairment	2,814	5,563
Ending amount	2,814	5,634
Loans Individually Evaluated for Impairment	1,730	11,432
Loans Collectively Evaluated for Impairment	89,211	59,445
Total Loans	90,941	70,877
Agricultural Loans [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	803	867
Provisions for credit losses	1,860	(64)
Charge-offs	(2,317)	0
Recoveries	6	0
Net charge-offs	(2,311)	0
Ending balance	352	803
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	381
Loans collectively evaluated for impairment	352	422
Ending amount	352	803
Loans Individually Evaluated for Impairment	192	1,853
Loans Collectively Evaluated for Impairment	35,977	43,630
Total Loans	36,169	45,483
Lease Financing [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	1	3
Provisions for credit losses	(11)	108
Charge-offs	0	(110)
Recoveries	11	0
Net charge-offs	11	(110)
Ending balance	1	1
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	1	1
Ending amount	1	1
Loans Individually Evaluated for Impairment	0	0
Loans Collectively Evaluated for Impairment	12	49
Total Loans	12	49
Residential Mortgages [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	7,392	5,103
Loans Collectively Evaluated for Impairment	47,624	34,579
Total Loans	55,016	39,682
Home Improvement and Home Equity Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	10	37
Loans Collectively Evaluated for Impairment	1,309	1,822
Total Loans	1,319	1,859
Total Real Estate Mortgage [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	18,457	11,827
Loans Collectively Evaluated for Impairment	171,477	170,304
Total Loans	189,934	182,131
Installment and Other [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	117	51
Provisions for credit losses	384	675
Charge-offs	(251)	(620)
Recoveries	38	11
Net charge-offs	(213)	(609)
Ending balance	288	117
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	288	117
Ending amount	288	117
Installment Loans [Member]
Period-end amount allocated to [Abstract]
Loans Individually Evaluated for Impairment	121	130
Loans Collectively Evaluated for Impairment	10,763	10,985
Total Loans	10,884	11,115
Unallocated [Member]
Summarizes activity in allowance for credit losses by loan category [Roll Forward]
Beginning balance	241	26
Provisions for credit losses	5,182	215
Charge-offs	0
Recoveries	0
Net charge-offs	0	0
Ending balance	5,423	241
Period-end amount allocated to [Abstract]
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	5,423	241
Ending amount	$ 5,423	$ 241
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of loan portfolio segment	3