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Borrowed Funds - Additional Information (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 15, 2025
Sep. 20, 2022
May 31, 2021
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2021
Jun. 30, 2021
Debt Instrument [Line Items]                  
Repayments of subordinated debt $ 100,000 $ 115,000              
Subordinated notes, interest rate 4.55% 5.25%           3.00%  
Loss on extinguishment of debt         $ 922 $ 0 $ 0    
Security owned and pledged as collateral, associated liabilities, fair value         $ 2,700,000 $ 3,000,000      
Subordinated Debt                  
Debt Instrument [Line Items]                  
Subordinated debt initial term         5 years        
Subordinated debt SOFR term         3 months        
Annual interest rate spread, percentage     2.78% 2.36%          
USAmeriBancorp, Inc.                  
Debt Instrument [Line Items]                  
Subordinated notes, interest rate     6.25%            
Subordinated debt, net     $ 150,000            
Subordinated debt initial term         5 years        
Subordinated debt SOFR term         3 months        
USAmeriBancorp, Inc. | Subordinated Debt                  
Debt Instrument [Line Items]                  
Subordinated debt initial term         5 years        
FHLB                  
Debt Instrument [Line Items]                  
Weighted average interest rate for long-term borrowings         4.42% 4.20%      
Subordinated Notes Due June 2031                  
Debt Instrument [Line Items]                  
Subordinated notes, interest rate       3.00%          
Subordinated debt, net       $ 300,000         $ 300,000
Net carrying value of subordinated debentures         $ 295,800 $ 285,000      
Subordinated Notes Due September 2032                  
Debt Instrument [Line Items]                  
Net carrying value of subordinated debentures         $ 149,200 $ 148,600