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Debt - Narrative (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Short term borrowings $ 114,097 $ 241,532
Maturity of federal funds purchased from correspondent banks one business day  
Maximum borrowing capacity $ 3,100,000  
Current borrowing available 1,900,000  
Federal home loan bank, maximum amount available, net of deposits and advances 2,100,000  
Letter of credit outstanding, amount 154,000 153,500
Other Correspondent Banks    
Debt Instrument [Line Items]    
Line of credit facility, remaining borrowing capacity 35,000  
Outstanding drawings $ 0 $ 0