v3.26.1
Securities - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Apr. 01, 2025
Debt Securities, Available-for-sale [Line Items]            
Proceeds from sales of securities available for sale $ 0 $ 686,485,000 $ 0 $ 686,485,000    
Available for sale securities, explicit or implicit performance indicating factors percentage     88.00%      
Allowance for credit losses - held to maturity securities 32,000   $ 32,000   $ 32,000  
Secure government, public and trust deposits            
Debt Securities, Available-for-sale [Line Items]            
Available for sale securities pledged as collateral 1,612,249,000   1,612,249,000   1,732,787,000  
Short-term borrowings            
Debt Securities, Available-for-sale [Line Items]            
Available for sale securities pledged as collateral 8,762,000   8,762,000   9,023,000  
Derivative Instruments            
Debt Securities, Available-for-sale [Line Items]            
Available for sale securities pledged as collateral $ 17,854,000   $ 17,854,000   $ 18,732,000  
Fair Value of Net Assets Acquired            
Debt Securities, Available-for-sale [Line Items]            
Securities           $ 1,457,377,000