Loan Portfolio, Impaired Receivables (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Recorded Investment
With no related allowance recorded	$ 12,752	$ 10,149
With an allowance recorded	12,862	16,646
Total	25,614	26,795
Unpaid Principal Balance
With no related allowance recorded	13,747	11,162
With an allowance recorded	13,465	18,552
Total	27,212	29,714
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	4,557	4,303
Total	4,557	4,303
Average Recorded Investment
With no related allowance recorded	13,287	11,320
With an allowance recorded	13,175	17,694
Total	26,462	29,014
Interest Income Recognized
With no related allowance recorded	149	141
With an allowance recorded	132	152
Total	281	293
Real estate loans, Construction [Member]
Recorded Investment
With no related allowance recorded	1,910	1,819
With an allowance recorded	987	1,150
Unpaid Principal Balance
With no related allowance recorded	2,187	2,370
With an allowance recorded	1,037	2,250
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	508	166
Average Recorded Investment
With no related allowance recorded	1,927	2,543
With an allowance recorded	1,016	1,685
Interest Income Recognized
With no related allowance recorded	13	0
With an allowance recorded	0	0
Real estate loans, Secured by farmland [Member]
Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Unpaid Principal Balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	0	0
Real estate loans, Secured by 1 - 4 family residential [Member]
Recorded Investment
With no related allowance recorded	4,363	3,248
With an allowance recorded	6,477	7,544
Unpaid Principal Balance
With no related allowance recorded	4,840	3,667
With an allowance recorded	6,707	8,203
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	2,904	2,724
Average Recorded Investment
With no related allowance recorded	4,664	3,712
With an allowance recorded	6,644	7,842
Interest Income Recognized
With no related allowance recorded	6	50
With an allowance recorded	51	65
Other real estate loans [Member]
Recorded Investment
With no related allowance recorded	4,347	3,135
With an allowance recorded	4,995	7,505
Unpaid Principal Balance
With no related allowance recorded	4,581	3,178
With an allowance recorded	5,288	7,605
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	830	1,045
Average Recorded Investment
With no related allowance recorded	4,421	3,141
With an allowance recorded	5,077	7,691
Interest Income Recognized
With no related allowance recorded	111	91
With an allowance recorded	71	73
Commercial loans [Member]
Recorded Investment
With no related allowance recorded	2,132	1,947
With an allowance recorded	373	417
Unpaid Principal Balance
With no related allowance recorded	2,139	1,947
With an allowance recorded	403	464
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	285	338
Average Recorded Investment
With no related allowance recorded	2,275	1,924
With an allowance recorded	408	446
Interest Income Recognized
With no related allowance recorded	19	0
With an allowance recorded	10	14
Consumer loans [Member]
Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	30	30
Unpaid Principal Balance
With no related allowance recorded	0	0
With an allowance recorded	30	30
Related Allowance
With no related allowance recorded	0	0
With an allowance recorded	30	30
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	30	30
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	$ 0	$ 0