v3.26.1
Loans Receivable - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Apr. 01, 2026
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Allowance for credit loss $ 328,369,000 $ 281,869,000 $ 328,369,000 $ 281,869,000   $ 297,634,000 $ 297,583,000 $ 279,944,000 $ 275,880,000
Mortgage Loans                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Mortgage loans held for sale 219,800,000   219,800,000       204,000,000.0    
SBA Loans                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans sold during period 0 $ 0 1,200,000 4,000,000.0          
Gain on sale of guaranteed portion of loans     80,000 $ 288,000          
Deteriorated Credit Quality | Accounting Standards Update 2016-13 | Cumulative Effect Period of Adoption Adjustment                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Allowance for credit loss 95,800,000   95,800,000       $ 52,200,000    
Mountain Commerce Bancorp Inc                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans receivable 1,468,899,000   1,468,899,000   $ 1,499,676,000        
Mountain Commerce Bancorp Inc | Deteriorated Credit Quality                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans receivable         46,300,000        
Mountain Commerce Bancorp Inc | Deteriorated Credit Quality | Accounting Standards Update 2016-13 | Cumulative Effect Period of Adoption Adjustment                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Allowance for credit loss 45,700,000   45,700,000            
Mountain Commerce Bancorp Inc | Financial Asset Acquired and No Credit Deterioration                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Loans receivable         $ 1,420,000,000        
Happy Bancshares, Inc. | Deteriorated Credit Quality | Accounting Standards Update 2016-13 | Cumulative Effect Period of Adoption Adjustment                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Allowance for credit loss $ 50,100,000   $ 50,100,000