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Noninterest Income - Credit Card Fees (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Card interchange fees, net $ 21,775 $ 21,393
Revenue from contracts with customers 222,440 217,257
Revenue not from contract with customer 79,494 63,119
Total credit card fees 28,304 27,483
Merchant service fees    
Disaggregation of Revenue [Line Items]    
Revenue from contracts with customers 5,027 4,534
Card service fees    
Disaggregation of Revenue [Line Items]    
Revenue not from contract with customer $ 1,502 $ 1,556