Loans, Net - Loans identified as impaired by class of loan (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Recorded Investment [Abstract]
With no related allowance recorded	$ 9,127	$ 13,690
With an allowance recorded	10,780	8,468
Total	19,907	22,158
Unpaid Principal Balance [Abstract]
With no related allowance recorded	9,127	13,818
With an allowance recorded	10,832	9,370
Total	19,959	23,188
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	2,972	2,669
Total	2,972	2,669
Average Recorded Investment [Abstract]
With no related allowance recorded	9,166	13,879
With an allowance recorded	11,330	8,892
Total	20,496	22,771
Interest Income Recognized [Abstract]
With no related allowance recorded	122	592
With an allowance recorded	94	89
Total	216	681
Construction [Member]
Recorded Investment [Abstract]
With no related allowance recorded	114	131
With an allowance recorded	109	115
Unpaid Principal Balance [Abstract]
With no related allowance recorded	114	131
With an allowance recorded	109	115
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	60	66
Average Recorded Investment [Abstract]
With no related allowance recorded	123	138
With an allowance recorded	112	124
Interest Income Recognized [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	0	0
Secured by farmland [Member]
Recorded Investment [Abstract]
With no related allowance recorded	7,903	7,903
With an allowance recorded	0	0
Unpaid Principal Balance [Abstract]
With no related allowance recorded	7,903	7,903
With an allowance recorded	0	0
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	0	0
Average Recorded Investment [Abstract]
With no related allowance recorded	7,903	7,903
With an allowance recorded	0	0
Interest Income Recognized [Abstract]
With no related allowance recorded	113	454
With an allowance recorded	0	0
Secured by 1-4 family residential [Member]
Recorded Investment [Abstract]
With no related allowance recorded	642	1,919
With an allowance recorded	4,081	3,694
Unpaid Principal Balance [Abstract]
With no related allowance recorded	642	2,047
With an allowance recorded	4,133	3,746
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	1,412	1,370
Average Recorded Investment [Abstract]
With no related allowance recorded	667	2,032
With an allowance recorded	4,111	3,704
Interest Income Recognized [Abstract]
With no related allowance recorded	0	16
With an allowance recorded	8	11
Other real estate loans [Member]
Recorded Investment [Abstract]
With no related allowance recorded	0	3,289
With an allowance recorded	4,230	1,242
Unpaid Principal Balance [Abstract]
With no related allowance recorded	0	3,289
With an allowance recorded	4,230	1,242
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	454	294
Average Recorded Investment [Abstract]
With no related allowance recorded	0	3,352
With an allowance recorded	4,241	1,260
Interest Income Recognized [Abstract]
With no related allowance recorded	0	104
With an allowance recorded	78	69
Commercial loans [Member]
Recorded Investment [Abstract]
With no related allowance recorded	468	448
With an allowance recorded	327	398
Unpaid Principal Balance [Abstract]
With no related allowance recorded	468	448
With an allowance recorded	327	1,248
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	43	292
Average Recorded Investment [Abstract]
With no related allowance recorded	473	454
With an allowance recorded	344	783
Interest Income Recognized [Abstract]
With no related allowance recorded	9	18
With an allowance recorded	8	7
Consumer loans [Member]
Recorded Investment [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	2,033	3,019
Unpaid Principal Balance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	2,033	3,019
Related Allowance [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	1,003	647
Average Recorded Investment [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	2,522	3,021
Interest Income Recognized [Abstract]
With no related allowance recorded	0	0
With an allowance recorded	$ 0	$ 2