Loans - Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total ending loans balance	$ 3,469,845	$ 3,371,789
30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	3,433	4,430
60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,444	2,430
Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	17,199	20,682
Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	22,076	27,542
Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	3,447,769	3,344,247
Farmland
Financing Receivable, Past Due [Line Items]
Total ending loans balance	20,737	23,316
Farmland | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	195
Farmland | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Farmland | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,211	1,211
Farmland | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,211	1,406
Farmland | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	19,526	21,910
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Total ending loans balance	425,444	407,924
Owner-occupied, nonfarm nonresidential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	99	10
Owner-occupied, nonfarm nonresidential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	53	885
Owner-occupied, nonfarm nonresidential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	961	732
Owner-occupied, nonfarm nonresidential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,113	1,627
Owner-occupied, nonfarm nonresidential properties | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	424,331	406,297
Agricultural production and other loans to farmers
Financing Receivable, Past Due [Line Items]
Total ending loans balance	2,411	2,664
Agricultural production and other loans to farmers | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Agricultural production and other loans to farmers | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Agricultural production and other loans to farmers | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Agricultural production and other loans to farmers | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Agricultural production and other loans to farmers | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	2,411	2,664
Commercial and Industrial
Financing Receivable, Past Due [Line Items]
Total ending loans balance	687,333	663,550
Commercial and Industrial | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	252	476
Commercial and Industrial | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	272	335
Commercial and Industrial | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,275	3,887
Commercial and Industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,799	4,698
Commercial and Industrial | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	685,534	658,852
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Past Due [Line Items]
Total ending loans balance	131,862	132,818
Obligations (other than securities and leases) of states and political subdivisions | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Obligations (other than securities and leases) of states and political subdivisions | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Obligations (other than securities and leases) of states and political subdivisions | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Obligations (other than securities and leases) of states and political subdivisions | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Obligations (other than securities and leases) of states and political subdivisions | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	131,862	132,818
Other loans
Financing Receivable, Past Due [Line Items]
Total ending loans balance	13,404	11,961
Other loans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other loans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	13,404	11,961
Other construction loans and all land development and other land loans
Financing Receivable, Past Due [Line Items]
Total ending loans balance	240,957	205,734
Other construction loans and all land development and other land loans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other construction loans and all land development and other land loans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Other construction loans and all land development and other land loans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,467	1,917
Other construction loans and all land development and other land loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,467	1,917
Other construction loans and all land development and other land loans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	239,490	203,817
Multifamily (5 or more) residential properties
Financing Receivable, Past Due [Line Items]
Total ending loans balance	231,417	212,815
Multifamily (5 or more) residential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Multifamily (5 or more) residential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Multifamily (5 or more) residential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	209	0
Multifamily (5 or more) residential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	209	0
Multifamily (5 or more) residential properties | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	231,208	212,815
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Past Due [Line Items]
Total ending loans balance	628,669	640,945
Non-owner occupied, nonfarm nonresidential properties | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	112	314
Non-owner occupied, nonfarm nonresidential properties | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	203	156
Non-owner occupied, nonfarm nonresidential properties | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	10,543	10,184
Non-owner occupied, nonfarm nonresidential properties | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	10,858	10,654
Non-owner occupied, nonfarm nonresidential properties | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	617,811	630,291
1-4 Family Construction
Financing Receivable, Past Due [Line Items]
Total ending loans balance	34,394	27,768
1-4 Family Construction | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	6	0
1-4 Family Construction | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
1-4 Family Construction | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
1-4 Family Construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	6	0
1-4 Family Construction | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	34,388	27,768
Home equity lines of credit
Financing Receivable, Past Due [Line Items]
Total ending loans balance	104,897	109,444
Home equity lines of credit | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	320	166
Home equity lines of credit | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	87	235
Home equity lines of credit | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	254	486
Home equity lines of credit | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	661	887
Home equity lines of credit | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	104,236	108,557
Residential Mortgages secured by first liens
Financing Receivable, Past Due [Line Items]
Total ending loans balance	795,738	777,030
Residential Mortgages secured by first liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	2,221	2,834
Residential Mortgages secured by first liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	544	629
Residential Mortgages secured by first liens | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	1,050	1,911
Residential Mortgages secured by first liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	3,815	5,374
Residential Mortgages secured by first liens | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	791,923	771,656
Residential Mortgages secured by junior liens
Financing Receivable, Past Due [Line Items]
Total ending loans balance	55,177	53,726
Residential Mortgages secured by junior liens | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	73	8
Residential Mortgages secured by junior liens | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	91	0
Residential Mortgages secured by junior liens | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	8	66
Residential Mortgages secured by junior liens | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	172	74
Residential Mortgages secured by junior liens | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	55,005	53,652
Other revolving credit plans
Financing Receivable, Past Due [Line Items]
Total ending loans balance	24,691	25,507
Other revolving credit plans | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	16	36
Other revolving credit plans | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	17	19
Other revolving credit plans | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	5	0
Other revolving credit plans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	38	55
Other revolving credit plans | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	24,653	25,452
Automobile
Financing Receivable, Past Due [Line Items]
Total ending loans balance	22,924	25,344
Automobile | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	5	73
Automobile | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	6	0
Automobile | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	50	9
Automobile | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	61	82
Automobile | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	22,863	25,262
Other consumer
Financing Receivable, Past Due [Line Items]
Total ending loans balance	41,103	42,792
Other consumer | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	250	246
Other consumer | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	136	132
Other consumer | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	162	245
Other consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	548	623
Other consumer | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	40,555	42,169
Credit cards
Financing Receivable, Past Due [Line Items]
Total ending loans balance	8,453	8,115
Credit cards | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	79	72
Credit cards | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	35	39
Credit cards | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	4	34
Credit cards | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	118	145
Credit cards | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	8,335	7,970
Overdrafts
Financing Receivable, Past Due [Line Items]
Total ending loans balance	234	336
Overdrafts | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Overdrafts | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Overdrafts | Greater Than 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Overdrafts | Total Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	0	0
Overdrafts | Loans Not Past Due
Financing Receivable, Past Due [Line Items]
Total ending loans balance	$ 234	$ 336