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Loans, Allowance for Credit Losses, and Asset Quality Information - Narrative (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
Jun. 30, 2021
USD ($)
loan
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Loans and Leases Receivable Disclosure [Line Items]            
PPP loans $ 3,000 $ 39,000        
Unamortized net deferred loan fees 803 1,704        
Total loans 6,243,170 6,081,715        
Unamortized discount on acquired loans 14,000 17,200        
Interest income on nonaccrual loans 0 0        
Allowance for credit losses on loans 82,181 78,789 $ 82,069 $ 65,022 $ 65,849 $ 52,388
Asset Pledged as Collateral            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans 5,000,000 4,300,000        
Troubled Debt Restructuring            
Loans and Leases Receivable Disclosure [Line Items]            
Number of loans modified as TDR with commitments to lend funds | loan       3    
Commitment value for loans modified as TDR   0        
Consumer loans            
Loans and Leases Receivable Disclosure [Line Items]            
Allowance for credit losses on loans 2,630 2,656 2,439 $ 2,363 2,297 1,478
Commercial, financial, and agricultural            
Loans and Leases Receivable Disclosure [Line Items]            
Allowance for credit losses on loans $ 15,450 16,249 16,013 $ 14,809 $ 13,606 $ 11,316
Real Estate            
Loans and Leases Receivable Disclosure [Line Items]            
Threshold percentage to write-off nonaccrual loans 90.00%          
Real Estate | Receivable Benchmark | Receivable Type Concentration Risk            
Loans and Leases Receivable Disclosure [Line Items]            
Concentration risk percentage 89.00%          
Hotel | Minimum            
Loans and Leases Receivable Disclosure [Line Items]            
Threshold percentage to write-off nonaccrual loans 1000.00%          
Hotel | Maximum            
Loans and Leases Receivable Disclosure [Line Items]            
Threshold percentage to write-off nonaccrual loans 25.00%          
Non Real Estate            
Loans and Leases Receivable Disclosure [Line Items]            
Threshold percentage to write-off nonaccrual loans 75.00%          
Officers and Directors            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans $ 5,800          
Due from related parties 6,300 600        
Advances to related parties 66          
Repayments received from related parties 192          
Credit Card Loans            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans $ 40,800 37,900        
Credit Card Loans | Receivable Benchmark | Receivable Type Concentration Risk | Consumer loans            
Loans and Leases Receivable Disclosure [Line Items]            
Concentration risk percentage 54.00%          
Credit Card Loans | Receivable Benchmark | Receivable Type Concentration Risk | Commercial, financial, and agricultural            
Loans and Leases Receivable Disclosure [Line Items]            
Concentration risk percentage 46.00%          
Residential Mortgage Loans            
Loans and Leases Receivable Disclosure [Line Items]            
Presold mortgages in process of settlement $ 1,000 1,500        
Unfunded Loan Commitment            
Loans and Leases Receivable Disclosure [Line Items]            
Allowance for credit losses on loans 12,006 13,500 $ 13,506      
SBA PPP loans            
Loans and Leases Receivable Disclosure [Line Items]            
Unamortized net deferred loan fees 300 2,600        
SBA Loans            
Loans and Leases Receivable Disclosure [Line Items]            
Remaining unaccreted discount $ 5,400 $ 6,000