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Significant Events Narrative (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
USD ($)
Aug. 01, 2020
USD ($)
Jun. 30, 2020
USD ($)
Significant Events [Abstract]      
Increase in Loans and Leases Receivable, Allowance $ 11,300    
Percent Increase in Loans and Leases Receivable, Allowance 57.90%    
Provision for loan and lease losses, specific reserves, increase (decrease) during the period $ 5,500    
Financing Receivable, Allowance for Credit Losses, Increase due to Economic Conditions $ 4,700    
Gross Loans and Leases Outstanding, Short-Term Modification, Percent 6 Month Deferral Period 7.10%   18.60%
Number of Short-Term Loan Modifications 60    
Gross Loans and Leases Outstanding, Short-Term Modification $ 131,500   $ 323,200
Goodwill, Impairment Loss $ 0    
Equity, Fair Value Disclosure   $ 289,000  
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount   $ 89,400  
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount   44.80%