Loans and Allowance for Credit Losses on Loans (Temporary Loan Modifications) (Details) $ in Thousands	Dec. 31, 2020 USD ($) loan
Loans and Leases Receivable Disclosure [Line Items]
Temporary Loan Modifications, COVID-Related Loan Modification, Number of Contracts | loan	53
Temporary Loan Modifications, COVID-Related Modification, Recorded Investment | $	$ 26,535
COVID-Related Modifications Percentage of Total Loans	0.008
Commercial
Loans and Leases Receivable Disclosure [Line Items]
Temporary Loan Modifications, COVID-Related Loan Modification, Number of Contracts | loan	25
Temporary Loan Modifications, COVID-Related Modification, Recorded Investment | $	$ 19,866
COVID-Related Modifications Percentage of Total Loans	0.006
Retail Portfolio Segment
Loans and Leases Receivable Disclosure [Line Items]
Temporary Loan Modifications, COVID-Related Loan Modification, Number of Contracts | loan	28
Temporary Loan Modifications, COVID-Related Modification, Recorded Investment | $	$ 6,669
COVID-Related Modifications Percentage of Total Loans	0.002