Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	$ 2,630,616	$ 2,666,442
Financing Receivable, Past Due	32,939	31,590
Financing Receivable, Not Past Due	2,597,677	2,634,852
Total loans	2,618,380	2,652,530
Loans not rated	2,618,380
Commercial & Industrial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	617,688	599,955
Financing Receivable, Past Due	7,923	5,030
Financing Receivable, Not Past Due	609,765	594,925
Total loans	615,918	597,709
Farmland
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	134,779	139,951
Financing Receivable, Past Due	1,532	2,221
Financing Receivable, Not Past Due	133,247	137,730
Total loans	133,004	137,275
Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	384,883	402,707
Financing Receivable, Past Due	4,893	3,853
Financing Receivable, Not Past Due	379,990	398,854
Total loans	383,958	401,775
Agriculture
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	144,785	163,199
Financing Receivable, Past Due	6	405
Financing Receivable, Not Past Due	144,779	162,794
Total loans	141,704	160,126
All Other Commercial
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	293,900	288,954
Financing Receivable, Past Due	972	109
Financing Receivable, Not Past Due	292,928	288,845
Total loans	292,756	287,562
First Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	374,751	385,126
Financing Receivable, Past Due	8,813	9,202
Financing Receivable, Not Past Due	365,938	375,924
Total loans	373,578	383,912
Home Equity
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	68,568	71,034
Financing Receivable, Past Due	361	221
Financing Receivable, Not Past Due	68,207	70,813
Total loans	68,379	70,842
Junior Liens
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	55,565	55,097
Financing Receivable, Past Due	412	564
Financing Receivable, Not Past Due	55,153	54,533
Total loans	55,439	54,974
Multifamily
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	144,813	148,282
Financing Receivable, Past Due	1,621	0
Financing Receivable, Not Past Due	143,192	148,282
Total loans	144,489	147,943
All Other Residential
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	21,235	24,482
Financing Receivable, Past Due	110	1,972
Financing Receivable, Not Past Due	21,125	22,510
Total loans	21,175	24,406
Motor Vehicle
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	359,253	355,691
Financing Receivable, Past Due	5,948	7,741
Financing Receivable, Not Past Due	353,305	347,950
Total loans	357,729	354,198
All Other Consumer
Analysis of risk category of loans by class of loans
Financing Receivable Recorded Investment	30,396	31,964
Financing Receivable, Past Due	348	272
Financing Receivable, Not Past Due	30,048	31,692
Total loans	30,251	31,808
Pass
Analysis of risk category of loans by class of loans
Total loans	1,718,129	1,821,763
Pass | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	568,957	549,341
Pass | Farmland
Analysis of risk category of loans by class of loans
Total loans	115,976	119,858
Pass | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	366,697	381,404
Pass | Agriculture
Analysis of risk category of loans by class of loans
Total loans	118,014	127,144
Pass | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	288,600	283,266
Pass | First Liens
Analysis of risk category of loans by class of loans
Total loans	103,047	174,338
Pass | Home Equity
Analysis of risk category of loans by class of loans
Total loans	2,466	18,417
Pass | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	2,189	2,839
Pass | Multifamily
Analysis of risk category of loans by class of loans
Total loans	143,064	146,497
Pass | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	8,255	12,624
Pass | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	495	2,880
Pass | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	369	3,155
Special Mention
Analysis of risk category of loans by class of loans
Total loans	38,774	41,100
Special Mention | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	16,870	19,253
Special Mention | Farmland
Analysis of risk category of loans by class of loans
Total loans	9,213	8,673
Special Mention | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	4,427	4,424
Special Mention | Agriculture
Analysis of risk category of loans by class of loans
Total loans	3,999	4,507
Special Mention | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	3,095	3,141
Special Mention | First Liens
Analysis of risk category of loans by class of loans
Total loans	1,026	926
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	34	64
Special Mention | Multifamily
Analysis of risk category of loans by class of loans
Total loans	110	112
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	69,271	82,662
Substandard | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	22,758	26,349
Substandard | Farmland
Analysis of risk category of loans by class of loans
Total loans	7,753	8,644
Substandard | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	12,149	12,269
Substandard | Agriculture
Analysis of risk category of loans by class of loans
Total loans	19,193	27,490
Substandard | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	1,025	1,120
Substandard | First Liens
Analysis of risk category of loans by class of loans
Total loans	4,089	4,382
Substandard | Home Equity
Analysis of risk category of loans by class of loans
Total loans	170	134
Substandard | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	171	178
Substandard | Multifamily
Analysis of risk category of loans by class of loans
Total loans	1,315	1,315
Substandard | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	52	205
Substandard | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	546	538
Substandard | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	50	38
Doubtful
Analysis of risk category of loans by class of loans
Total loans	0	92
Doubtful | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	0	5
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	11
Doubtful | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	0	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	792,206	706,913
Not Rated | Commercial & Industrial
Analysis of risk category of loans by class of loans
Total loans	7,333	2,761
Not Rated | Farmland
Analysis of risk category of loans by class of loans
Total loans	62	100
Not Rated | Non Farm, Non Residential
Analysis of risk category of loans by class of loans
Total loans	685	3,678
Not Rated | Agriculture
Analysis of risk category of loans by class of loans
Total loans	498	985
Not Rated | All Other Commercial
Analysis of risk category of loans by class of loans
Total loans	36	35
Not Rated | First Liens
Analysis of risk category of loans by class of loans
Total loans	265,416	204,266
Not Rated | Home Equity
Analysis of risk category of loans by class of loans
Total loans	65,743	52,280
Not Rated | Junior Liens
Analysis of risk category of loans by class of loans
Total loans	53,045	51,817
Not Rated | Multifamily
Analysis of risk category of loans by class of loans
Total loans	0	19
Not Rated | All Other Residential
Analysis of risk category of loans by class of loans
Total loans	12,868	11,577
Not Rated | Motor Vehicle
Analysis of risk category of loans by class of loans
Total loans	356,688	350,780
Not Rated | All Other Consumer
Analysis of risk category of loans by class of loans
Total loans	$ 29,832	$ 28,615