Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	$ 2,676,091	$ 1,961,208
Financing Receivable, Past Due	15,737	16,682
Financing Receivable, Not Past Due	2,660,354	1,944,526
Total loans	2,664,805	1,951,063
Loans not rated	2,664,805
Commercial & Industrial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	603,304	520,021
Financing Receivable, Past Due	1,936	1,782
Financing Receivable, Not Past Due	601,368	518,239
Total loans	601,612	518,410
Farmland
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	139,064	107,640
Financing Receivable, Past Due	2,105	2,659
Financing Receivable, Not Past Due	136,959	104,981
Total loans	136,933	105,756
Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	409,788	188,763
Financing Receivable, Past Due	60	57
Financing Receivable, Not Past Due	409,728	188,706
Total loans	409,375	188,333
Agriculture
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	160,379	148,733
Financing Receivable, Past Due	493	388
Financing Receivable, Not Past Due	159,886	148,345
Total loans	157,711	146,056
All Other Commercial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	278,743	208,666
Financing Receivable, Past Due	151	33
Financing Receivable, Not Past Due	278,592	208,633
Total loans	277,371	207,797
First Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	414,830	236,951
Financing Receivable, Past Due	4,193	5,267
Financing Receivable, Not Past Due	410,637	231,684
Total loans	413,959	236,147
Home Equity
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	69,899	39,651
Financing Receivable, Past Due	362	273
Financing Receivable, Not Past Due	69,537	39,378
Total loans	69,835	39,582
Junior Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	53,660	49,531
Financing Receivable, Past Due	582	420
Financing Receivable, Not Past Due	53,078	49,111
Total loans	53,541	49,417
Multifamily
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	163,803	109,609
Financing Receivable, Past Due	0	0
Financing Receivable, Not Past Due	163,803	109,609
Total loans	163,437	109,378
All Other Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	7,318	9,170
Financing Receivable, Past Due	0	24
Financing Receivable, Not Past Due	7,318	9,146
Total loans	7,284	9,146
Motor Vehicle
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	342,736	314,790
Financing Receivable, Past Due	5,681	5,552
Financing Receivable, Not Past Due	337,055	309,238
Total loans	341,324	313,490
All Other Consumer
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	32,567	27,683
Financing Receivable, Past Due	174	227
Financing Receivable, Not Past Due	32,393	27,456
Total loans	32,423	27,551
Pass
Analysis of risk category of loans by class of loans
Total loans	1,840,878	1,206,608
Pass | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	550,274	472,008
Pass | Farmland
Analysis of risk category of loans by class of loans
Total loans	121,097	90,367
Pass | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	390,707	170,757
Pass | Agriculture
Analysis of risk category of loans by class of loans
Total loans	125,250	118,952
Pass | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	269,763	198,302
Pass | First Liens
Analysis of risk category of loans by class of loans
Total loans	193,626	43,915
Pass | Home Equity
Analysis of risk category of loans by class of loans
Total loans	18,375	963
Pass | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	2,895	1,983
Pass | Multifamily
Analysis of risk category of loans by class of loans
Total loans	161,976	109,361
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	3,224	0
Pass | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	3,691	0
Special Mention
Analysis of risk category of loans by class of loans
Total loans	42,157	44,799
Special Mention | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	18,205	20,600
Special Mention | Farmland
Analysis of risk category of loans by class of loans
Total loans	7,472	7,587
Special Mention | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	5,469	5,442
Special Mention | Agriculture
Analysis of risk category of loans by class of loans
Total loans	4,239	10,010
Special Mention | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	4,123	43
Special Mention | First Liens
Analysis of risk category of loans by class of loans
Total loans	1,142	1,043
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	67	74
Special Mention | Multifamily
Analysis of risk category of loans by class of loans
Total loans	1,440	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	81,334	64,562
Substandard | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	26,901	18,374
Substandard | Farmland
Analysis of risk category of loans by class of loans
Total loans	8,354	7,783
Substandard | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	12,577	10,439
Substandard | Agriculture
Analysis of risk category of loans by class of loans
Total loans	27,654	16,637
Substandard | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	155	6,777
Substandard | First Liens
Analysis of risk category of loans by class of loans
Total loans	4,540	3,504
Substandard | Home Equity
Analysis of risk category of loans by class of loans
Total loans	452	148
Substandard | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	185	224
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	13	15
Substandard | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	470	627
Substandard | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	33	34
Doubtful
Analysis of risk category of loans by class of loans
Total loans	80	76
Doubtful | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	4	0
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	0
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	76
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	700,356	635,018
Not Rated | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	6,228	7,428
Not Rated | Farmland
Analysis of risk category of loans by class of loans
Total loans	10	19
Not Rated | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	622	1,695
Not Rated | Agriculture
Analysis of risk category of loans by class of loans
Total loans	568	457
Not Rated | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	3,330	2,675
Not Rated | First Liens
Analysis of risk category of loans by class of loans
Total loans	214,651	187,685
Not Rated | Home Equity
Analysis of risk category of loans by class of loans
Total loans	51,008	38,471
Not Rated | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	50,318	47,060
Not Rated | Multifamily
Analysis of risk category of loans by class of loans
Total loans	21	17
Not Rated | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	7,271	9,131
Not Rated | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	337,630	312,863
Not Rated | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	$ 28,699	$ 27,517