Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	$ 1,872,907	$ 1,845,040
Financing Receivable, Recorded Investment, Past Due	14,442	15,501
Financing Receivable, Recorded Investment, Current	1,858,465	1,829,539
Total loans	1,863,444	1,835,974
Loans not rated	1,863,444
Commercial & Industrial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	464,915	476,089
Financing Receivable, Recorded Investment, Past Due	1,507	1,683
Financing Receivable, Recorded Investment, Current	463,408	474,406
Total loans	463,539	474,904
Farmland
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	108,727	111,200
Financing Receivable, Recorded Investment, Past Due	3,639	303
Financing Receivable, Recorded Investment, Current	105,088	110,897
Total loans	106,741	109,185
Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	198,916	195,488
Financing Receivable, Recorded Investment, Past Due	0	368
Financing Receivable, Recorded Investment, Current	198,916	195,120
Total loans	198,478	195,085
Agriculture
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	148,469	151,772
Financing Receivable, Recorded Investment, Past Due	1,260	713
Financing Receivable, Recorded Investment, Current	147,209	151,059
Total loans	146,332	149,535
All Other Commercial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	194,939	178,186
Financing Receivable, Recorded Investment, Past Due	27	15
Financing Receivable, Recorded Investment, Current	194,912	178,171
Total loans	194,008	177,473
First Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	258,686	270,778
Financing Receivable, Recorded Investment, Past Due	2,920	6,332
Financing Receivable, Recorded Investment, Current	255,766	264,446
Total loans	257,817	269,948
Home Equity
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	36,241	36,059
Financing Receivable, Recorded Investment, Past Due	182	277
Financing Receivable, Recorded Investment, Current	36,059	35,782
Total loans	36,167	36,003
Junior Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	40,560	37,407
Financing Receivable, Recorded Investment, Past Due	449	495
Financing Receivable, Recorded Investment, Current	40,111	36,912
Total loans	40,467	37,315
Multifamily
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	82,828	67,799
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable, Recorded Investment, Current	82,828	67,799
Total loans	82,629	67,643
All Other Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	12,270	13,036
Financing Receivable, Recorded Investment, Past Due	12	54
Financing Receivable, Recorded Investment, Current	12,258	12,982
Total loans	12,231	13,002
Motor Vehicle
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	300,923	282,697
Financing Receivable, Recorded Investment, Past Due	4,316	5,093
Financing Receivable, Recorded Investment, Current	296,607	277,604
Total loans	299,715	281,465
All Other Consumer
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	25,433	24,529
Financing Receivable, Recorded Investment, Past Due	130	168
Financing Receivable, Recorded Investment, Current	25,303	24,361
Total loans	25,320	24,416
Pass
Analysis of risk category of loans by class of loans
Total loans	1,110,757	1,092,587
Pass | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	424,500	427,262
Pass | Farmland
Analysis of risk category of loans by class of loans
Total loans	87,650	95,115
Pass | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	174,709	172,739
Pass | Agriculture
Analysis of risk category of loans by class of loans
Total loans	112,100	121,983
Pass | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	182,009	163,492
Pass | First Liens
Analysis of risk category of loans by class of loans
Total loans	44,959	43,674
Pass | Home Equity
Analysis of risk category of loans by class of loans
Total loans	324	363
Pass | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	1,954	1,826
Pass | Multifamily
Analysis of risk category of loans by class of loans
Total loans	82,552	66,133
Pass | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	0	0
Pass | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	0	0
Pass | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	0	0
Special Mention
Analysis of risk category of loans by class of loans
Total loans	59,434	47,868
Special Mention | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	12,758	16,286
Special Mention | Farmland
Analysis of risk category of loans by class of loans
Total loans	11,537	8,300
Special Mention | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	9,529	5,745
Special Mention | Agriculture
Analysis of risk category of loans by class of loans
Total loans	21,831	13,885
Special Mention | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	2,819	596
Special Mention | First Liens
Analysis of risk category of loans by class of loans
Total loans	881	1,541
Special Mention | Home Equity
Analysis of risk category of loans by class of loans
Total loans	0	0
Special Mention | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	79	85
Special Mention | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	1,430
Special Mention | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	0	0
Special Mention | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	0	0
Special Mention | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	0	0
Substandard
Analysis of risk category of loans by class of loans
Total loans	64,526	74,699
Substandard | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	17,983	25,177
Substandard | Farmland
Analysis of risk category of loans by class of loans
Total loans	7,528	5,238
Substandard | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	14,240	16,601
Substandard | Agriculture
Analysis of risk category of loans by class of loans
Total loans	12,113	12,301
Substandard | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	7,673	10,058
Substandard | First Liens
Analysis of risk category of loans by class of loans
Total loans	3,979	4,466
Substandard | Home Equity
Analysis of risk category of loans by class of loans
Total loans	117	86
Substandard | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	239	401
Substandard | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	15
Substandard | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	49	0
Substandard | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	542	331
Substandard | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	63	25
Doubtful
Analysis of risk category of loans by class of loans
Total loans	312	569
Doubtful | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	203	449
Doubtful | Farmland
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | Agriculture
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	0	76
Doubtful | First Liens
Analysis of risk category of loans by class of loans
Total loans	8	18
Doubtful | Home Equity
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	101	26
Doubtful | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	0	0
Doubtful | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	0	0
Not Rated
Analysis of risk category of loans by class of loans
Total loans	628,415	620,251
Not Rated | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	8,095	5,730
Not Rated | Farmland
Analysis of risk category of loans by class of loans
Total loans	26	532
Not Rated | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	0	0
Not Rated | Agriculture
Analysis of risk category of loans by class of loans
Total loans	288	1,366
Not Rated | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	1,507	3,251
Not Rated | First Liens
Analysis of risk category of loans by class of loans
Total loans	207,990	220,249
Not Rated | Home Equity
Analysis of risk category of loans by class of loans
Total loans	35,726	35,554
Not Rated | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	38,094	34,977
Not Rated | Multifamily
Analysis of risk category of loans by class of loans
Total loans	77	65
Not Rated | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	12,182	13,002
Not Rated | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	299,173	281,134
Not Rated | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	$ 25,257	$ 24,391