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Accrued Interest Receivable and Other Assets (Narrative) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other assets [Line Items]      
Allowance for credit losses $ 155,937 $ 204,809 $ 116,539
Prepaid expenses 61,061 61,332  
Prepaid municipal, property, and income taxes 54,600 54,300  
Other repossessed assets 1,945 1,816  
COVID-19 Deferral Program Loans      
Other assets [Line Items]      
Allowance for credit losses $ 161 $ 711