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Borrowings - Schedule of Amount Outstanding (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Debt Disclosure [Abstract]    
Federal funds purchased $ 240,000 $ 191,000
Federal Home Loan Bank advances 1,100,000 1,250,000
Other borrowings:    
Short-term promissory notes issued to customers and customer repurchase agreements 611,304 574,394
Other Borrowings Non-customer Funding 0 315,000
Other Borrowings, Non-customer Funding, Activity for Year, Maximum Outstanding at any Month End 0 315,000
Other Borrowings, Other, Activity for Year, Maximum Outstanding at any Month End 1,151 0
Other borrowings 838 1,179
Total other borrowings 612,142 890,573
Borrowings, maximum amounts outstanding    
Federal funds purchased, maximum outstanding 862,000 292,000
Federal Home Loan Bank advances, maximum outstanding 1,720,000 1,250,000
Customer funding, maximum outstanding $ 646,439 $ 574,394