v3.26.1
Loans and Allowance for Credit Losses - Schedule of Amortized Cost Basis of Collateral-Dependent Loans (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans $ 11,683,856 $ 11,444,216
Construction and development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 569,593 570,749
Commercial, financial & agricultural    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 1,799,584 1,761,287
Commercial real estate    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 4,845,345 4,730,529
Commercial real estate | Non-owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 3,249,479 3,150,269
Commercial real estate | Owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 1,595,866 1,580,260
Residential real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 3,475,428 3,321,101
Residential real estate | Home equity lines of credit    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 433,330 410,845
Total    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 31,450 20,628
Total | Construction and development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 1,414 2,530
Total | Commercial, financial & agricultural    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 9,741 4,404
Total | Commercial real estate | Non-owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 16,143 9,029
Total | Commercial real estate | Owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 3,705 4,049
Total | Commercial real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans   616
Total | Residential real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 419  
Total | Residential real estate | Home equity lines of credit    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 28 0
Real Estate    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 21,709 16,224
Real Estate | Construction and development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 1,414 2,530
Real Estate | Commercial, financial & agricultural    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 0 0
Real Estate | Commercial real estate | Non-owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 16,143 9,029
Real Estate | Commercial real estate | Owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 3,705 4,049
Real Estate | Commercial real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans   616
Real Estate | Residential real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 419  
Real Estate | Residential real estate | Home equity lines of credit    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 28 0
Business Assets    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 9,741 4,404
Business Assets | Construction and development    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 0 0
Business Assets | Commercial, financial & agricultural    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 9,741 4,404
Business Assets | Commercial real estate | Non-owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 0 0
Business Assets | Commercial real estate | Owner occupied CRE    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 0 0
Business Assets | Commercial real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans   0
Business Assets | Residential real estate | Residential mortgage loans    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans 0  
Business Assets | Residential real estate | Home equity lines of credit    
Financing Receivable, Allowance for Credit Loss [Line Items]    
Collateral dependent loans $ 0 $ 0