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Investment Securities Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Schedule of Investments [Line Items]      
Marketable Securities, Unrealized Gain (Loss)   $ (400)  
Proceeds from sales of AFS securities $ 108,961 59,342  
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 $ 2,300,000   $ 2,500,000