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Investment Securities Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
May 01, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]          
Marketable Securities, Unrealized Gain (Loss) $ (400)        
Proceeds from sales of AFS securities   $ 109,252 $ 125,811    
HTM securities   1,215,325     $ 965,867
fair value of AFS securities transferred to HTM       $ 415,200  
Amortize value of securities transferred from AFS to HTM       $ 479,000  
Visa          
Schedule of Investments [Line Items]          
Gain on sale of shares 34,000        
Auction Rate Securities [Member]          
Schedule of Investments [Line Items]          
Proceeds from sales of AFS securities $ 24,600        
Collateral Pledged [Member]          
Schedule of Investments [Line Items]          
Securities pledged as collateral   $ 1,800,000     $ 2,500,000