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Deposits - Summary of Deposit Balances (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Deposit Liability [Line Items]    
Time deposits $ 2,380,043  
Interest-bearing deposit accounts 1,065,912 $ 1,144,357
Savings accounts 864,935 919,244
Money market deposit accounts 894,690 775,488
Governmental deposit accounts 824,136 726,713
Total interest-bearing deposits 6,029,716 5,584,648
Non-interest-bearing deposits 1,453,441 1,567,649
Total deposits 7,483,157 7,152,297
Brokered CDs    
Deposit Liability [Line Items]    
Time deposits 495,904 575,429
Retail certificates of deposits ("CDs"):    
Deposit Liability [Line Items]    
$100 or more 1,069,312 815,300
Less than $100 814,827 628,117
Time deposits $ 1,884,139 $ 1,443,417