Loans - Schedule of Credit Risk Profile By Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	$ 3,432,937	$ 3,337,449
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	2,283,796	2,200,393
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	32,326	33,457
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	66,112	67,877
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	2,382,234	2,301,727
Farmland | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	17,406	20,316
Farmland | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	1,514	1,156
Farmland | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	1,817	1,844
Farmland | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Farmland | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	20,737	23,316
Owner-occupied, nonfarm nonresidential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	412,406	391,899
Owner-occupied, nonfarm nonresidential properties | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	2,563	2,826
Owner-occupied, nonfarm nonresidential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	10,475	13,199
Owner-occupied, nonfarm nonresidential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Owner-occupied, nonfarm nonresidential properties | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	425,444	407,924
Agricultural production and other loans to farmers | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	2,411	2,664
Agricultural production and other loans to farmers | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Agricultural production and other loans to farmers | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Agricultural production and other loans to farmers | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Agricultural production and other loans to farmers | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	2,411	2,664
Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	660,505	637,071
Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	11,682	11,368
Commercial and Industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	15,146	15,111
Commercial and Industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Commercial and Industrial | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	687,333	663,550
Obligations (other than securities and leases) of states and political subdivisions | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	131,031	132,110
Obligations (other than securities and leases) of states and political subdivisions | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Obligations (other than securities and leases) of states and political subdivisions | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	831	708
Obligations (other than securities and leases) of states and political subdivisions | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Obligations (other than securities and leases) of states and political subdivisions | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	131,862	132,818
Other loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	13,404	11,961
Other loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Other loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Other loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Other loans | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	13,404	11,961
Other construction loans and all land development and other land loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	234,533	198,206
Other construction loans and all land development and other land loans | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	4,957	5,611
Other construction loans and all land development and other land loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	1,467	1,917
Other construction loans and all land development and other land loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Other construction loans and all land development and other land loans | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	240,957	205,734
Multifamily (5 or more) residential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	230,235	211,563
Multifamily (5 or more) residential properties | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Multifamily (5 or more) residential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	1,182	1,252
Multifamily (5 or more) residential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Multifamily (5 or more) residential properties | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	231,417	212,815
Non-owner occupied, nonfarm nonresidential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	581,865	594,603
Non-owner occupied, nonfarm nonresidential properties | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	11,610	12,496
Non-owner occupied, nonfarm nonresidential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	35,194	33,846
Non-owner occupied, nonfarm nonresidential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	0	0
Non-owner occupied, nonfarm nonresidential properties | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Net loans	$ 628,669	$ 640,945