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Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Service Charges on Deposit Accounts $ 7,451 $ 7,364
Fees, Exchange, and Other Service Charges 13,200 14,208
Annuity and Insurance 928 2,578
Other 10,350 5,606
Noninterest Income 46,149 43,679
Accounting Standards Update 2014-09    
Disaggregation of Revenue [Line Items]    
Noninterest Income 46,149 43,679
Accounting Standards Update 2014-09 | Noninterest Income In Scope of Topic 606    
Disaggregation of Revenue [Line Items]    
Trust and Asset Management 10,915 10,761
Service Charges on Deposit Accounts 3,053 3,349
Fees, Exchange, and Other Service Charges 10,518 11,552
Annuity and Insurance 895 2,544
Other 2,302 2,471
Noninterest Income 27,683 30,677
Accounting Standards Update 2014-09 | Noninterest Income Out of Scope of Topic 606    
Disaggregation of Revenue [Line Items]    
Noninterest Income $ 18,466 $ 13,002