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Deposits - Summary of Deposit Balances (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Deposit Liability [Line Items]    
Time deposits $ 2,425,470  
Interest-bearing deposit accounts 1,068,443 $ 1,085,152
Savings accounts 884,230 866,959
Money market deposit accounts 948,177 878,254
Governmental deposit accounts 769,782 775,782
Total interest-bearing deposits 6,096,102 6,082,544
Non-interest-bearing deposits 1,536,094 1,507,661
Total deposits 7,632,196 7,590,205
Brokered CDs    
Deposit Liability [Line Items]    
Time deposits 416,851 554,982
Retail certificates of deposits ("CDs"):    
Deposit Liability [Line Items]    
$100 or more 1,153,707 1,092,261
Less than $100 854,912 829,154
Time deposits $ 2,008,619 $ 1,921,415