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Summary of Significant Accounting Policies - Schedule of Impact of ASC (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans $ 3,337,449 $ 2,804,035 $ 2,784,562    
Allowance for credit losses on loans 34,340 19,473 19,473 $ 19,704 $ 19,693
Retained earnings 218,727   201,503    
Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   2,804,035      
Allowance for credit losses on loans   19,473      
Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   2,804,705      
Allowance for credit losses on loans   24,436      
Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   670      
Allowance for credit losses on loans   4,963 4,963    
Balance sheet reclassification   (670)      
Total pre-tax impact   4,293      
Tax effect   (902)      
Retained earnings   3,391      
Commercial, industrial, and agricultural          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   1,046,665      
Allowance for credit losses on loans   8,287 8,287 7,341 6,160
Commercial, industrial, and agricultural | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   (1,046,665)      
Allowance for credit losses on loans   (8,287)      
Commercial, industrial, and agricultural | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Commercial, industrial, and agricultural | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Commercial, industrial, and agricultural | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Farmland          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 221 0 190    
Farmland | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,199      
Allowance for credit losses on loans   190      
Farmland | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,199      
Allowance for credit losses on loans   190      
Farmland | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,199      
Allowance for credit losses on loans   251      
Farmland | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   61 61    
Owner-occupied, nonfarm nonresidential properties          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 3,700 0 2,390    
Owner-occupied, nonfarm nonresidential properties | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   333,117      
Allowance for credit losses on loans   2,390      
Owner-occupied, nonfarm nonresidential properties | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   333,117      
Allowance for credit losses on loans   2,390      
Owner-occupied, nonfarm nonresidential properties | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   333,117      
Allowance for credit losses on loans   1,636      
Owner-occupied, nonfarm nonresidential properties | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (754) (754)    
Agricultural production and other loans to farmers          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 24 0 25    
Agricultural production and other loans to farmers | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   3,407      
Allowance for credit losses on loans   25      
Agricultural production and other loans to farmers | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   3,407      
Allowance for credit losses on loans   25      
Agricultural production and other loans to farmers | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   3,407      
Allowance for credit losses on loans   30      
Agricultural production and other loans to farmers | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   5 5    
Commercial and Industrial          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 6,233 0 4,105    
Commercial and Industrial | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   474,614      
Allowance for credit losses on loans   4,105      
Commercial and Industrial | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   474,614      
Allowance for credit losses on loans   4,105      
Commercial and Industrial | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   474,614      
Allowance for credit losses on loans   3,474      
Commercial and Industrial | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (631) (631)    
Obligations (other than securities and leases) of states and political subdivisions          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 998 0 1,022    
Obligations (other than securities and leases) of states and political subdivisions | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   139,052      
Allowance for credit losses on loans   1,022      
Obligations (other than securities and leases) of states and political subdivisions | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   139,052      
Allowance for credit losses on loans   1,022      
Obligations (other than securities and leases) of states and political subdivisions | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   139,052      
Allowance for credit losses on loans   791      
Obligations (other than securities and leases) of states and political subdivisions | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (231) (231)    
Other loans          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 68 0 41    
Other loans | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   5,740      
Allowance for credit losses on loans   41      
Other loans | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   5,740      
Allowance for credit losses on loans   41      
Other loans | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   5,740      
Allowance for credit losses on loans   49      
Other loans | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   8 8    
Commercial mortgages          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   814,002      
Allowance for credit losses on loans   6,952 6,952 7,490 9,007
Commercial mortgages | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   (814,002)      
Allowance for credit losses on loans   (6,952)      
Commercial mortgages | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Commercial mortgages | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Commercial mortgages | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Other construction loans and all land development and other land loans          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 1,956 0 2,327    
Other construction loans and all land development and other land loans | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   277,412      
Allowance for credit losses on loans   2,327      
Other construction loans and all land development and other land loans | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   277,412      
Allowance for credit losses on loans   2,327      
Other construction loans and all land development and other land loans | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   277,412      
Allowance for credit losses on loans   3,107      
Other construction loans and all land development and other land loans | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   780 780    
Multifamily (5 or more) residential properties          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 2,724 0 1,087    
Multifamily (5 or more) residential properties | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   124,390      
Allowance for credit losses on loans   1,087      
Multifamily (5 or more) residential properties | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   124,390      
Allowance for credit losses on loans   1,087      
Multifamily (5 or more) residential properties | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   124,390      
Allowance for credit losses on loans   1,399      
Multifamily (5 or more) residential properties | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   312 312    
Non-owner occupied, nonfarm nonresidential properties          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Non-owner occupied, nonfarm nonresidential properties | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   467,852      
Allowance for credit losses on loans   3,980      
Non-owner occupied, nonfarm nonresidential properties | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   467,852      
Allowance for credit losses on loans   3,980      
Non-owner occupied, nonfarm nonresidential properties | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   468,522      
Allowance for credit losses on loans   6,527      
Non-owner occupied, nonfarm nonresidential properties | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   670      
Allowance for credit losses on loans   2,547      
Residential Real Estate          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   814,030 814,030    
Allowance for credit losses on loans   1,499 1,499 2,156 2,033
Residential Real Estate | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   (814,030)      
Allowance for credit losses on loans   (1,499)      
Residential Real Estate | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Residential Real Estate | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Residential Real Estate | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
1-4 Family Construction          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 82 0 56    
1-4 Family Construction | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   22,427      
Allowance for credit losses on loans   56      
1-4 Family Construction | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   22,427      
Allowance for credit losses on loans   56      
1-4 Family Construction | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   22,427      
Allowance for credit losses on loans   21      
1-4 Family Construction | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (35) (35)    
Home equity lines of credit          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 985 0 180    
Home equity lines of credit | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   95,089      
Allowance for credit losses on loans   180      
Home equity lines of credit | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   95,089      
Allowance for credit losses on loans   180      
Home equity lines of credit | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   95,089      
Allowance for credit losses on loans   601      
Home equity lines of credit | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   421 421    
Residential Mortgages secured by first liens          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 4,539 0 1,220    
Residential Mortgages secured by first liens | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   646,199      
Allowance for credit losses on loans   1,220      
Residential Mortgages secured by first liens | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   646,199      
Allowance for credit losses on loans   1,220      
Residential Mortgages secured by first liens | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   646,199      
Allowance for credit losses on loans   2,320      
Residential Mortgages secured by first liens | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   1,100 1,100    
Residential Mortgages secured by junior liens          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 241 0 114    
Residential Mortgages secured by junior liens | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   57,965      
Allowance for credit losses on loans   114      
Residential Mortgages secured by junior liens | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   57,965      
Allowance for credit losses on loans   114      
Residential Mortgages secured by junior liens | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   57,965      
Allowance for credit losses on loans   249      
Residential Mortgages secured by junior liens | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   135 135    
Consumer, net of unearned discount          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   119,623      
Consumer, net of unearned discount | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   (119,623)      
Consumer, net of unearned discount | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Consumer, net of unearned discount | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Consumer, net of unearned discount | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Consumer          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans     124,785    
Allowance for credit losses on loans   2,411 2,411 2,377 2,179
Consumer | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Allowance for credit losses on loans   (2,411)      
Consumer | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Allowance for credit losses on loans   0      
Consumer | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Allowance for credit losses on loans   0      
Consumer | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Allowance for credit losses on loans   0      
Other revolving credit plans          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 507 0 296    
Other revolving credit plans | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   52,353      
Allowance for credit losses on loans   296      
Other revolving credit plans | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   52,353      
Allowance for credit losses on loans   296      
Other revolving credit plans | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   52,353      
Allowance for credit losses on loans   674      
Other revolving credit plans | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   378 378    
Automobile          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 132 0 156    
Automobile | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,807      
Allowance for credit losses on loans   156      
Automobile | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,807      
Allowance for credit losses on loans   156      
Automobile | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   27,807      
Allowance for credit losses on loans   60      
Automobile | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (96) (96)    
Other consumer          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans 2,962 0 1,960    
Other consumer | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   39,697      
Allowance for credit losses on loans   1,960      
Other consumer | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   39,697      
Allowance for credit losses on loans   1,960      
Other consumer | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   39,697      
Allowance for credit losses on loans   2,981      
Other consumer | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   1,021 1,021    
Credit Cards          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   7,569 7,569    
Allowance for credit losses on loans 66 84 84 103 120
Credit Cards | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Credit Cards | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   7,569      
Allowance for credit losses on loans   84      
Credit Cards | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   7,569      
Allowance for credit losses on loans   26      
Credit Cards | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   (58) (58)    
Overdrafts          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   2,146      
Allowance for credit losses on loans $ 244 240 240 $ 237 $ 194
Overdrafts | Reclassification to CECL Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   0      
Overdrafts | Pre-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   2,146      
Allowance for credit losses on loans   240      
Overdrafts | Post-CECL Adoption Portfolio Segmentation          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   2,146      
Allowance for credit losses on loans   240      
Overdrafts | Impact of CECL Adoption          
Financing Receivable, Allowance for Credit Loss [Line Items]          
Net loans   0      
Allowance for credit losses on loans   $ 0 $ 0