v3.26.1
Loans, Allowance for Credit Losses, and Asset Quality Information - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Loans and Leases Receivable Disclosure [Line Items]            
Unamortized discount on acquired loans $ 6,600,000     $ 6,600,000   $ 8,800,000
Total loans, net of deferred loan costs/(fees) 8,988,748,000     8,988,748,000   8,722,419,000
Interest income on nonaccrual loans   $ 0   0    
Commercial and industrial | Combination - Interest Rate Reduction and Term Extension            
Loans and Leases Receivable Disclosure [Line Items]            
Recorded Investment 0   $ 0 0 $ 0  
Hurricane            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans $ 253,000,000     253,000,000    
Allowance for loan and lease losses, period increase       $ 1,900,000   $ 1,900,000
Financing receivable, allowance for credit loss to outstanding, percent 1.39%     1.39%   1.42%
Hurricane | Portions Of Western North And South Carolina            
Loans and Leases Receivable Disclosure [Line Items]            
Allowance for loan and lease losses, period increase (decrease), percent 0.0002     0.0002   0.0002
Real Estate | Receivable Benchmark | Collateral Type Concentration Risk            
Loans and Leases Receivable Disclosure [Line Items]            
Concentration risk percentage       88.00%    
Nonperforming Financial Instruments            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans, net of deferred loan costs/(fees) $ 44,283,000     $ 44,283,000   $ 36,315,000
Nonperforming loans, commitment to lend 0     0   0
Residential Mortgage Loans            
Loans and Leases Receivable Disclosure [Line Items]            
Presold mortgages in process of settlement 1,900,000     1,900,000   1,000,000.0
Nonperforming loans, commitment to lend 0     0    
Officers and Directors            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans, net of deferred loan costs/(fees) 59,800,000     59,800,000   60,700,000
Officers and Directors | Unused lines of Credit            
Loans and Leases Receivable Disclosure [Line Items]            
Financing receivable, excluding accrued interest, available credit 0     0   300,000
Asset Pledged as Collateral            
Loans and Leases Receivable Disclosure [Line Items]            
Total loans, net of deferred loan costs/(fees) 7,400,000,000     7,400,000,000   7,100,000,000
SBA Loans            
Loans and Leases Receivable Disclosure [Line Items]            
Unamortized discount on acquired loans $ 2,100,000     $ 2,100,000   $ 2,000,000.0