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Investment Securities Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
May 01, 2022
HTM, at amortized cost $ 1,267,922 $ 1,321,256    
Estimated Fair Value 1,072,207      
Proceeds from sales of AFS securities 213,424 196,411 $ 359,137  
fair value of AFS securities transferred to HTM       $ 415,200
Amortize value of securities transferred from AFS to HTM       $ 479,000
Collateral Pledged        
Available-for-sale securities pledged as collateral $ 400,000 1,100,000    
State and municipal securities        
HTM, at amortized cost   1,321,256    
Estimated Fair Value   $ 1,125,049