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Loans, Allowance for Credit Losses, and Asset Quality Information - Narrative (Details)
 12 Months Ended
Dec. 31, 2025
USD ($)
loan
Dec. 31, 2024
USD ($)
reporting_unit
Loans and Leases Receivable Disclosure [Line Items]    
Unamortized discount on acquired loans $ 8,800,000 $ 15,100,000
Loans 8,722,419,000 8,094,676,000
Interest income on nonaccrual loans 0 0
Net book balance of individually evaluated loans on nonaccrual, threshold amount for designation as collateral dependent loans 500,000  
Total Loans Receivable 8,721,682,000 8,093,488,000
Hurricane    
Loans and Leases Receivable Disclosure [Line Items]    
Total loans 268,000,000  
Allowance for loan and lease losses, period increase $ 1,900,000 $ 13,000,000.0
Financing receivable, allowance for credit loss to outstanding, percent 1.42% 1.51%
Hurricane | Portions Of Western North And South Carolina    
Loans and Leases Receivable Disclosure [Line Items]    
Allowance for loan and lease losses, period increase, Percent 0.0002 0.0016
Special Mention Loans    
Loans and Leases Receivable Disclosure [Line Items]    
Total Loans Receivable $ 29,300,000 $ 37,100,000
Classified    
Loans and Leases Receivable Disclosure [Line Items]    
Total Loans Receivable $ 58,500,000 65,800,000
Real Estate    
Loans and Leases Receivable Disclosure [Line Items]    
Threshold percentage to write-off nonaccrual loans 90.00%  
Real Estate | Receivable Benchmark | Collateral Type Concentration Risk    
Loans and Leases Receivable Disclosure [Line Items]    
Percentage 87.00%  
Residential 1-4 family real estate    
Loans and Leases Receivable Disclosure [Line Items]    
Presold mortgages in process of settlement $ 1,000,000.0 1,200,000
Nonperforming loans, commitment to lend 0 $ 100,000
Number of loans to debtors with nonperforming loans | reporting_unit   1
Management    
Loans and Leases Receivable Disclosure [Line Items]    
Loans $ 60,700,000 $ 62,900,000
Number of new loans to related parties | loan 0  
Repayments received from related parties $ (1,900,000)  
Loans payable (300,000)  
Management | Unused lines of Credit    
Loans and Leases Receivable Disclosure [Line Items]    
Financing receivable, excluding accrued interest, available credit 300,000 1,000,000.0
Asset Pledged as Collateral without Right    
Loans and Leases Receivable Disclosure [Line Items]    
Loans 7,100,000,000 6,700,000,000
SBA Loans    
Loans and Leases Receivable Disclosure [Line Items]    
Unamortized discount on acquired loans $ 2,000,000.0 $ 2,900,000