v3.26.1
Loans and Allowance for Credit Losses - Additional Information (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Loan
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Loan
Feb. 01, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 03, 2025
USD ($)
Apr. 01, 2025
USD ($)
Dec. 31, 2024
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans unaccreted discounts and deferred fees net of deferred costs $ 23,500,000   $ 22,000,000          
Allowance for credit losses (51,455,000) $ (40,456,000) $ (43,949,000)         $ (40,304,000)
Non-accrual loans, accrued interest $ 0 $ 0            
Number of loans | Loan 0   1          
Restructured loans subsequent payment default $ 0   $ 0          
Securitized loan transactions         $ 250,000,000 $ 150,000,000 $ 100,000,000  
Fair value of loans acquired       $ 805,200,000        
April Mortgage Loan [Member]                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Securitized loan transactions             $ 100,000,000  
June Mortgage Loan [Member]                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Securitized loan transactions           $ 150,000,000    
Keystone Bancshares, Inc.                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loans       805,219,000        
Fair value of loans acquired       805,200,000        
Contractual balance       812,800,000        
PSL Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Contractual balance       804,600,000        
PCD Loans                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans unaccreted discounts and deferred fees net of deferred costs 700,000              
Allowance for credit losses $ (1,000,000)              
Contractual balance       $ 8,200,000