Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	$ 1,934,706	$ 1,913,022
Financing Receivable, Recorded Investment, Past Due	16,553	21,305
Financing Receivable, Recorded Investment, Current	1,918,153	1,891,717
Total loans	1,925,822	1,903,609
Loans not rated	1,925,822
Commercial & Industrial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	487,151	475,801
Financing Receivable, Recorded Investment, Past Due	1,178	1,092
Financing Receivable, Recorded Investment, Current	485,973	474,709
Total loans	485,766	474,500
Farmland
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	105,733	108,469
Financing Receivable, Recorded Investment, Past Due	3,240	4,012
Financing Receivable, Recorded Investment, Current	102,493	104,457
Total loans	104,326	106,596
Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	185,641	200,945
Financing Receivable, Recorded Investment, Past Due	2,493	141
Financing Receivable, Recorded Investment, Current	183,148	200,804
Total loans	185,209	200,502
Agriculture
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	138,126	153,090
Financing Receivable, Recorded Investment, Past Due	600	702
Financing Receivable, Recorded Investment, Current	137,526	152,388
Total loans	136,458	150,936
All Other Commercial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	227,755	207,875
Financing Receivable, Recorded Investment, Past Due	127	0
Financing Receivable, Recorded Investment, Current	227,628	207,875
Total loans	226,496	206,956
First Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	245,788	255,247
Financing Receivable, Recorded Investment, Past Due	3,247	8,218
Financing Receivable, Recorded Investment, Current	242,541	247,029
Total loans	244,883	254,384
Home Equity
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	36,773	36,116
Financing Receivable, Recorded Investment, Past Due	278	364
Financing Receivable, Recorded Investment, Current	36,495	35,752
Total loans	36,707	36,036
Junior Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	44,939	42,262
Financing Receivable, Recorded Investment, Past Due	230	574
Financing Receivable, Recorded Investment, Current	44,709	41,688
Total loans	44,837	42,155
Multifamily
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	103,207	90,141
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable, Recorded Investment, Current	103,207	90,141
Total loans	102,956	89,972
All Other Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	12,819	13,641
Financing Receivable, Recorded Investment, Past Due	0	312
Financing Receivable, Recorded Investment, Current	12,819	13,329
Total loans	12,780	13,596
Motor Vehicle
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	320,598	303,972
Financing Receivable, Recorded Investment, Past Due	5,052	5,761
Financing Receivable, Recorded Investment, Current	315,546	298,211
Total loans	319,343	302,631
All Other Consumer
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	26,176	25,463
Financing Receivable, Recorded Investment, Past Due	108	129
Financing Receivable, Recorded Investment, Current	26,068	25,334
Total loans	26,061	25,345
Pass
Analysis of risk category of loans by class of loans
Total loans	1,155,173	1,140,885
Pass | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	440,200	430,015
Pass | Farmland
Analysis of risk category of loans by class of loans
Total loans	88,020	88,338
Pass | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	164,517	179,181
Pass | Agriculture
Analysis of risk category of loans by class of loans
Total loans	110,111	111,724
Pass | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	202,503	194,170
Pass | First Liens
Analysis of risk category of loans by class of loans
Total loans	44,343	45,320
Pass | Home Equity
Analysis of risk category of loans by class of loans
Total loans	543	319
Pass | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	2,000	1,882
Pass | Multifamily
Analysis of risk category of loans by class of loans
Total loans	102,936	89,936
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	46,940	59,391
Special Mention | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	18,948	19,889
Special Mention | Farmland
Analysis of risk category of loans by class of loans
Total loans	7,738	10,782
Special Mention | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	7,797	7,689
Special Mention | Agriculture
Analysis of risk category of loans by class of loans
Total loans	8,768	17,482
Special Mention | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	2,623	2,723
Special Mention | First Liens
Analysis of risk category of loans by class of loans
Total loans	988	750
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	78	76
Special Mention | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	0
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	69,461	73,784
Substandard | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	18,741	18,611
Substandard | Farmland
Analysis of risk category of loans by class of loans
Total loans	8,547	7,466
Substandard | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	12,895	13,632
Substandard | Agriculture
Analysis of risk category of loans by class of loans
Total loans	17,132	21,388
Substandard | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	7,099	7,459
Substandard | First Liens
Analysis of risk category of loans by class of loans
Total loans	3,963	3,980
Substandard | Home Equity
Analysis of risk category of loans by class of loans
Total loans	68	64
Substandard | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	220	342
Substandard | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	0
Substandard | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	0	67
Substandard | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	751	731
Substandard | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	45	44
Doubtful
Analysis of risk category of loans by class of loans
Total loans	114	143
Doubtful | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	38	38
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	0
Doubtful | First Liens
Analysis of risk category of loans by class of loans
Total loans	0	5
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	76	100
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	654,134	629,406
Not Rated | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	7,839	5,947
Not Rated | Farmland
Analysis of risk category of loans by class of loans
Total loans	21	10
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	447	342
Not Rated | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	14,271	2,604
Not Rated | First Liens
Analysis of risk category of loans by class of loans
Total loans	195,589	204,329
Not Rated | Home Equity
Analysis of risk category of loans by class of loans
Total loans	36,096	35,653
Not Rated | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	42,463	39,755
Not Rated | Multifamily
Analysis of risk category of loans by class of loans
Total loans	20	36
Not Rated | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	12,780	13,529
Not Rated | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	318,592	301,900
Not Rated | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	$ 26,016	$ 25,301